The Johns Hopkins University

1999

Chemical Propulsion Information Agenc y

BulletinVol. 25, No. 1, Jantutry 1999

Multimillion-Dollar Research Effortsat the University of Illinois at Urbana-Champaig n

1946

golf/ •klr:AI

A DTIC-Sponsored DoD Information Analysis Center

• To develop an understanding of thedynamic combustion behavior of newenergetic materials as monopropellant sand new and conventional energetic ma-terials as composite propellants .

• To find new combinations of energeticmaterials with high energy density, nochlorine, and minimal burning rate re-sponse to pressure and velocity fluctua-tions, as well as sufficient combustio nchamber acoustic particle damping with -out the penalties of stable condense dphase products .

At Illinois, said Krier, "we are doin gexperiments with special propellant ma-terials that have vastly different chemi-cal makeups, and we 're trying to deter -mine why they behave as they do underdynamic conditions ." Specific tasks in-clude :

From left to right, graduate student Ryo Fuchinoue ,Prof. Herman Krier, and graduate student Heng Ho kexamine a solid rocket motor test facility with whichcombustion instability research is conducted .

The Illinois consortium's objective sare :

In recent years, the field of soli drocket propulsion has received a boos tfrom researchers based at the Universit yof Illinois at Urbana-Champaign(UIUC) . A leader in propulsion and com-bustion studies for several decades, Illi-nois is the site for two multimillion-dol-lar research efforts, the DoD-fundedMultidisciplinary University Researc hInitiative (MURI) Consortium on nove lenergetic materials and the DoE-spon-sored Center for Simulation of AdvancedRockets .

Together, the two centers provide anopportunity for Illinois researchers to do"synergistic research into propulsion androcketry that may be impossible at anyother institution," according to Willia mR. Schowalter, Dean of the College ofEngineering .

MURI CONSORTIUM IS INVESTIGATIN G

NEW ENERGETIC MATERIAL S

Profs . Quinn Brewster and Herma n

Krier head the University of Illinois atUrbana-Champaign MURI Consortium ,a group of 13 principal investigators, threeat UIUC and seven at six other researc huniversities, who are studying novel en-ergetic materials to stabilize rockets . Thefive-year, $6 .85-million project wa sfunded in 1995 by the Ballistic Missil eDefense Organization under the Depart-ment of Defense's MURI. "The UIUCConsortium is part of a bigger MURI pro -gram, with a similarly sized effort ad -ministered out of Caltech," sai dBrewster. "The whole program is coor-dinated by Fred Blomshield at the ChinaLake Naval Air Warfare Center."

• Developing new devices and tech-niques to measure dynamic propel-lant combustion response to pres-sure and velocity fluctuations andevaluating new combinations o fenergetic materials .

• Determining thermal decomposi-tion mechanisms and parameters fornew energetic materials.

• Investigating boron and aluminumparticle ignition and combustion, inatmospheres of propellant gaseou sspecies (including fluorine com-pounds), with emphasis on deter -mining the importance of pressure-and velocity-coupled response .

continued on page 4

Contents :1999 JANNAF 3

New Look for JANNAF 5

EPTS/SPIRITS Meeting 7

Panel Workshop 6

Corrections 6

See Insert fo rBulletin Renewa l

CPIA Publications List 2

CPIA Ti/B i List 2

Bulletin Board (Mtgs) 3

JANNAF (Mtgs) back

CPIA ' s Technical /Bibliographi cInquiry Service

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-or theoretical performance calcula-tions. The CPIA staff responds tonearly 800 inquiries per year fro mover 180 customer organizations .CPIA invites inquiries via telephone ,fax, e-mail, or letter. For further in -formation, please contact Tom Mooreat (410) 992-7306, or e-mail :tmoore@jhu.edu. Subjects covere din recent inquiries include :

Technical Inquiries

• Liquid Propellant XM46 Stabilit yEnhancemen t

• Fracture Properties of Ti-6A1-4 VAlloy at Cryogenic Temperatures

• Thermodynamic Properties ,Combustion, DecompositionKinetics of Monomethyl Hydrazine(MMH )

• Regulatory Status of MethyleneDianilin e

• Formulative Data on PBXN-110 andH-6 Explosives

• Stabilizers for High-ConcentrationHydrogen Peroxide

• Physical and ChemicalCharacteristics of MNA Stabilize rSolubility of Helium in Hydrazineand Monomethyl Hydrazine

• BAM Impact and Rotary Frictio nTest Methods

• Gelled Hydrazine Propellant SafetyIssue s

• Analytical Methods of DeterminingMNA Content in Gumstoc kSample s

• Evaporation Rate of Hydrazine,Hydrazine Derivatives, and NitrogenTetroxide

Bibliographic Inquiries

• Issues with Spin-stabilized Soli dPropellant Motors for Multi-Stag eVehicle

• Development of Plastisol Propellants

Recent CPIA Publication s

LS98-13, Vulnerability of SolidGun Propellants, Oct 199 8

CPIA/M7, Liquid RocketEngine Static Test Facilities,(various units), Sep 1998

CPIA/M8, Solid Rocket Moto rStatic Test Facilities Manual,(various units), Sep 1998

The Chemical Propulsion Information Agenc y(CPIA), a DoD Information Analysis Center, i ssponsored and administratively managed by th eDefense Technical Information Center (DTIC) . CPI Ais responsible for the acquisition, compilation,analysis, and dissemination of information and dat arelevant to chemical, electric, and nuclear propul-sion technology . In addition, CPIA providestechnical and administrative support to the Join tArmy-Navy-NASA-Air Force (JANNAF) Inter -agency Propulsion Committee . The purpose o fJANNAF is to solve propulsion problems, effec tcoordination of technical programs, and promote a nexchange of technical information in the areas o fmissile, space, and gun propulsion technology . Afee commensurate with CPIA products and service sis charged to subscribers, who must meet securit yand need-to-know requirements .

The Bulletin (circulation : 9,061) is publishe dbimonthly and is available free of charge to th epropulsion community . Reproduction ofBulletinarticles is permissible, with attribution. Neither theU .S . Government, CPIA, nor any person acting o ntheir behalf, assumes any liability resulting fro mthe use or publication of the information containe din this document, or warrants that such use o rpublication of the information contained in thi sdocument will be free from privately owned rights .The content of the Bulletin is approved for publi crelease, and distribution is unlimited .

Paid commercial Advertisements published in theBulletin do not represent any endorsement by CPIA .

Mary L . Hartman

Edito rSharon P. Counihan

Layout Artis t(410) 992-7307

Fax (410) 730-496 9E-mail :

mlhart@jhunix .hcf.jhu .ed uWorld Wide Web : http://www .jhu .edu/–cpia/

The Johns Hopkins University/CPIA10630 Little Patuxent Parkway, Suite 202Columbia, Maryland 21044-3204

Operating under Contract : SPO700-97-D-400 4

Page 2

CPIA Bulletin/Vol . 25, No. 1, January 1999

The

letin BoardThe following are various meetings and events . We welcome all such announcements ,so that the propulsion community can be better served with timely information . SeeCPIA's Homepage "Calendar of Events" link (URL=http ://www.jhu .edu/—cpia/) .

Date s199 91

99 Topic Sponsor Location

1/11-14 37th Aerospace Sciences Meeting AIAA Reno, NV

1/25 27Sensors for the Detection and Analysis of Energetics,

NDIA Arlington, VA

1/31-2/4

Explosives and Pyrotechnics Symposium

1999 Space Technology and Applications InternationalAIAA Albuquerque, NM

4/6-8

Forum (STAIF)

Fuze, Munitions Technology and SPC NDIA Tampa, FL

4/12-15

40th AIAA/ASME/ASCE/AHS/ASC Structures, StructuralDynamics, and Materials Conference, AIAA/ASME/AHS

AIAA St. Louis, M O

4/27-29

Adaptive Structures Forum, AIAA Forum on Non-Deterministic Approache s

17th Symposium on Explosives and PyrotechnicsFranklinApplied Essington, PA

5/3-5

(co-sponsored by IDL Industries, Ltd ., India)

Global Air & Space '99 International Business Forum and

Physics, Inc .

AIAA Arlington, VA

5/17-20

Exhibition

Global Demilitarization NDIA Tulsa, OK

6/20-24 35th Joint Propulsion Conference and Exhibit AIAA Los Angeles, C A

7/19-228th Annual AIAA/BMDO Technology Readiness

AIAA Boston, MA

8/22-26

Conference and Exhibit

218th American Chemical Society National Meeting ACS New Orleans, LA

9/28-30 AIAA Space Technology Conference and Exposition AIAA Albuquerque, NM

11/15-18 Insensitive Munitions and Energetic Materials NDIA Tampa, FL

11/15-19 18th International Symposium and Exhibition on Ballistics NDIA San Antonio, TX

AIAA = American Institute of Aeronautics and Astronautics, (703) 264-7500 or 800-639-2422ACS = American Chemical Society, Edward T. Urbansky (513) 569-7655 or fax : (513) 569-765 8Franklin Applied Physics, Inc . = (610) 666-664 5NDIA = National Defense Industrial Association, (703) 522-1820 or E-mail: awalko@ccmail.aot .com

"Information in the New Millennium "Annual IAC Awareness Conference

***February 17-18, 1999

at the Delta Orlando Resort in Orlando, Florid aSponsored by the Defense Technical Information Center, FB, Virgini a

Point of Contact :Ms. Sherry Davis (703) 767-8059 ore-mail : sdavis@dtic .mi l

1999 JAN NAFPropellant Development

& Characterization and Safety& Environmental Protectio n

Subcommittee Joint Meetin g

The Joint Army-Navy-NASA-Ai rForce (JANNAF) Propellant Develop-ment & Characterization Subcommittee(PDCS) and the Safety & Environmenta lProtection Subcommittee (S&EPS) wil lhold a joint meeting on April 26-30, 1999at the Town and Country Hotel and th eNaval Submarine Base in San Diego, Cali -fornia . This meeting may be comprisedof SECRET, CONFIDENTIAL an dCLASSIFIED sessions . Attendance willbe restricted to U .S . citizens with appro-priate clearances .

Propellant Development & Character-ization Subcommittee (PDCS) session swill cover the development, manufactur-ing, and characterization of propellant sand their ingredients . Papers have beensought on the topics of liquid propellants ,propellant process engineering, rheology,solid propellant chemistry test methods ,solid propellant ingredients, propellan tsurveillance and aging, and chemical re -activity.

The Safety & Environmental Protec-tion Subcommittee (S&EPS) sessions wil lcover topics such as : risk assessments ofrocket propellants, explosives and pyro-technics ; environmental and health effect sof propellants, precursors, combustio nproducts, and wastes, packaging, storageand transportability ; propellant handling ,use, and disposal ; demilitarization an dreclamation; emergency management ac-tivities; application of past experience ;propellant and explosive safety require-ments ; and manufacturing/processing haz-ards of energetic materials.

For additional information pleasephone CPIA, Sylvia Gomez-Knight 410 -992-7300 x213 or e-mail at : sjgomez @jhunix .hcf.jhu .edu .

CPIA Bulletin/Vol. 25, No . 1, January 1999

Page 3

Multimillion-Dollar Research Efforts . . .continuedfrompage ]

• Synthesizing new energetic com-pounds containing high-energy func -tional groups such as gemina ldifluoroamino and nitroamin ogroups .

• Developing a transient, multi -phase, combustion theory with em-phasis on microstructural propellantcombustion description .

"We want to create a new database fornovel propellants," said Krier, "that willexplain why they burn the way they do ."While the consortium ' s research is largelyexperimental, they are also modeling whatthey observe . "We want to explain thephysics and chemistry of combustio nevents that dominate the propellant burn-ing," Krier said .

Other members of the UIUC Consor-tium are Michael Micci at Penn State, whowith Brewster and Krier are taking diag-nostic measurements to properly charac-terize unstable burning ; Chuck Wight atthe University of Utah and Peter Politze rat the University of New Orleans, whoare working on decomposition chemistry ;Martin Richardson at Central Florida andFred Dryer and Rich Yetter at Princeton ,who along with Krier and Rod Burton atUIUC are investigating metal particle com-bustion; and Ted Axenrod and DaveParitosh at the City University of Ne wYork and Mark Trudell at the Universit yof New Orleans, who are working on th esynthesis of energetic materials . Consult-ants to the project are Bob Geisler, a re -tired Air Force propellant scientist ; BobGlick of Talley Defense Systems; BobBeddini and John Buckmaster, both fromUIUC's Department of Aeronautical andAstronautical Engineering; and NormanCohen, Bob Brown, Woody Waesche, andCarol Campbell .

"The problem is so complex andintercoupled, " said Krier, "that even withall these people it still is challenging ." Amajor emphasis for the consortium is edu-cating graduate students to be the next

generation of researchers in the field .Brewster expects approximately 70 stu-dents to have worked in the consortium' slabs by the end of the project in 2000 .

For further information about the UIU CMURI Consortium, visit its Web site athttp ://www.mie .uiuc.edu/research-in-struction/center/MURI/muri .html .

SIMULATING ROCKET BEHAVIOR

The five-year, $20-million Center fo r

Simulation of Advanced Rockets (CSAR )was funded by the Department of Energ yas part of its Accelerated Strategic Com-puting Initiative (ASCI), intended to ad-vance the state of the art in computationa lsimulation of complex, multicomponentphysical systems .

"Our work is contributing to a bette runderstanding of composite energeti cmaterials, including their ignition, com-bustion, shock physics, structural behav-ior, and quantum chemistry," said Prof.Michael Heath, CSAR director. "In addi-tion, it is greatly enhancing interdiscipli-nary interaction among our faculty andstudents." Both Illinois's expertise inrocket and propulsion research and its lon gtradition of computational science andengineering were factors in the establish-ment of the center. The availability oflarge-scale computing capability at theNational Center for Supercomputing Ap-plications (NCSA) was also important .

CSAR's overarching goal is the de-tailed, whole-system simulation of solidpropellant rockets under normal and ab-normal operating conditions . Specifi cgoals include :

• subscale simulations of materials an daccident scenarios ,

• accurate models of physical compo-nents ,

• interface code to enable componentinteractions ,

• computational infrastructure to sup -

port large-scale simulations, an d• research collaborations with DOElaboratories and the rocket industry .

The center's priorities are system inte-gration and validation of results . Toachieve system integration, interaction samong component models must be sup -ported at multiple levels : physical, math-ematical, numerical, and software . Vali-dation of component models is based o nstandard test cases with known solution sand data from laboratory experiments atUIUC and elsewhere . Validation of over-all system simulation will be based o nspecific rockets and accidents .

"We're dealing with fundamental sci-ence," said William Dick, CSAR 's man -aging director, "and we're dealing wit hlots of people doing lots of differen tthings, from chemists at the molecula rlevel to computer scientists at the archi-tectural level ." The five research groupsare :

• combustion and energetic materials ,

• fluid dynamics ,• structures and materials ,• computational mathematics an dgeometry, and

• computational environment .

These groups operate under a researc hplan that embodies parallel, interlockingactivities :

• Increasing complexity in geometry ,physical models, component coupling ,and software architecture, which re -quires

• Parallel activities in basic research ,model development, code implemen-tation, and computational infrastruc-ture .

CSAR currently comprises 108 people ,including 42 senior investigators from 12departments ; 18 technical staff, 3 admin-istrative staff, 40 graduate students, and

continued on page 6

Page 4

CPIA Bulletin/Vol. 25, No . 1, January 1999

A New Look for the JANNAF Propulsion Meetin gThe JANNAF Interagency Propulsion Committee (IPC) has been

evaluating the meeting format and meeting frequency for th eJANNAF Propulsion Meeting (JPM) since 1992 . In the last sixyears the JPM has been scheduled at 18 month, 24 month and 1 2month intervals . It has been held as a stand-alone meeting (1992) ,combined with various annual subcommittee meetings (1 in 1993 ,5 in 1995 and 4 in 1996), and most recently was co-located withthe AIAA Joint Propulsion Conference (JPC) in Cleveland, Ohioin July 1998. Direct-mailing and on-site meeting surveys havebeen conducted to determine which format and meeting interva lbest serves the needs of the JANNAF propulsion community . As aresult of these surveys and studies, the JANNAF Executive Com -mittee has established a new meeting format and fixed the meet-ing interval at 18 months .

The new JPM format recognizes that the technical strength o fthe JANNAF IPC is with the nine JANNAF subcommittees . Byincorporating subcommittee annual reports, invited subcommit-tee papers of broad JANNAF interest, and cross-cutting subcom -mittee workshops into the JPM agenda, and by restricting, in gen -eral, specialized papers to the subcommittee meetings, the JANNAFExecutive Committee believes that the overall impact of the IPCand the uniqueness of the JPM compared to other propulsion con -ferences will be enhanced . The JPM call for papers will be re-stricted to those papers of broad general interest to the whol eJANNAF community — propulsion systems, strategic, TBMD, ai rcombat, strike, space boost, gun propulsion, in-space propulsion ,payoffs, etc . — or to topics not covered by the subcommittees tominimize the number of concurrent sessions . Papers that are moresuitable for a subcommittee meeting will not be accepted ; butrather referred to the appropriate subcommittee.

The JPM interval has been set at 18 months, with alternat emeetings having a slightly different duration and format . Thenext JPM is a three-day, stand-alone meeting to be held in Decem -ber 1999 in Tucson, Arizona or Monterey, California . The alter-nate meetings will be a two-day meeting co-located with the AIA AJPC. Thus, the JPM following the December 1999 JPM will be inSalt Lake City, Utah during July 2001 .

The general format for the three-day JPM is shown in Table 1and the format for the two-day JPM co-located with the AIAA JPCis shown in Table 2 .

Table 1 - JPM Schedule When Not Held With AIAA JP C

Day Time Activity

Tuesday 0730 Registration

0800 Key Note Addres s

0900 Concurrent sessions structuredaround mission types — strategic,TBMD, air combat, strike, space

CP1A Bulletin/Vol . 25, No. 1, January 1999

0900

boost, in-space, etc . Only papersaddressing system issues .

1300

Concurrent sessions (if needed )with papers invited from the previ-ous year's subcommittee meetings .

0800 Concurrent workshops (if needed )on topics of interest to more thanone subcommittee .

1300

Plenary session for subcommitteereports .

Evening

Social

0730 Briefings for industry. Govern-ment labs present papers on thei rin-house work.

Table 2 - JPM Schedule When Held With AIAA JP C

Day

Time

Activity

Thursday

0730

Registration

0800

Key Note Addres s

0900

Concurrent sessions structure daround mission types — strategic ,TBMD, air combat, strike, spaceboost, in-space, etc . Only papersaddressing system issues .

1300

Concurrent sessions (if needed )with papers invited from the previ-ous year's subcommittee meetings .

Evening

Social

Friday 0730 Briefings for industry . Govern-ment labs present papers on theirin-house work .

The afternoon of the first day of the three-day JPM will consis tof concurrent sessions of invited papers selected from those previ -ously presented at subcommittee meetings . These could be longerpapers than normal . This will assure that the "best" papers arepresented at the JPM. This might also be recognized as a peerreview of the papers, encouraging submittals from activities and /or individuals that don't usually submit papers . The session chair -men at the subcommittee meetings will nominate particularly goo dpapers for inclusion at the next JPM . The Subcommittee Techni -cal Steering Group (TSG) will then finalize the list from that sub -committee and send the list to the JPM program committee forfinal selection and approval . In addition to selected papers, pa-pers summarizing workshops held at the subcommittees may als obe included. One criterion for selection of a paper is that it be o fgeneral interest to a broader JANNAF audience. The authors of theselected papers will be asked to update their papers if the pape rwas a report of ongoing work .

The morning of the middle day of the three-day JPM will con-sist of 3 or 4 concurrent subcommittee workshops (see Table 1) .

continued on page 7

Table 1 ...

Wednesday

Thursday

Page 5

Multimillion-Dollar Research Efforts . . .continuedfvm page 4

5 undergraduate students . That number i sprojected to rise to 130 by 2001, prima-rily from increased technical staffing."We're not buying equipment, we 're buy-ing people," said William Dick.

The Science Steering Committee in-cludes Phillipe Geubelle from the Depart -ment of Aeronautical and AstronauticalEngineering; Michael Norman from As-tronomy ; Keith Hjelmstad from Civil an dEnvironmental Engineering ; David Padua,Daniel Reed, and Director Heath fro mComputer Science; Quinn Brewster andHerman Krier from Mechanical and In-dustrial Engineering; Robert Moser an dScott Stewart from Theoretical and Ap-plied Mechanics ; Managing Director Wil -liam Dick; and Technical Program Man-ager Robert Fiedler.

An External Advisory Board has beenestablished to guide the center in indus-trial applications of solid propellant rock-ets . Current members include Thiokol ,Lockheed-Martin, AlliantTechsystems ,Aerojet, and Atlantic Research . In addi-tion, representatives from other universi-ties and government laboratories are par-ticipating .

In its first year CSAR has completedpreliminary two-dimensional and three -dimensional integrated rocket simulation sbased on Space Shuttle SRB parameters .Animated visualizations of these result scan be found on the CSAR Web site ,

. Work has begun onthe refined component models, compre-hensive interface code, and sophisticate dcomputational infrastructure necessary fo ra fully capable rocket simulation tool —a "virtual" rocket .

Both CSAR and the MURI Consortiumpresent the results of their work at theJANNAF Combustion and PropulsionMeetings and the AIAA Joint Propulsio nConference .

In Prof Quinn Brewster's laboratory, UIUCgraduate student Ben Chorpening prepares totake an emission spectroscopy measurement on asolid propellant strand to measure flame struc-ture.

JANNAFStructures and Mechanical Behavio r

Service Life Panel Worksho p

The JANNAF Structures and Mechani -cal Behavior Subcommittee Service LifePanel is sponsoring a 3-½ day worksho pat the Poe Conference Center, Hill AFB ,Utah on March 23-26, 1999 . The objec-tives of the workshop are to review cur -rent service life program approaches an dtechniques, identify technology needs an ddevelop recommendations for future gov -ernment sponsored programs in the tim eframe of 2003 to 2015. Attendance is lim -ited to invited participants only.

The first two days are comprised of areview of the three main tasks of theThiokol Propulsion Service Life Predic-tive Technology program : Propellant/Bondline Constitutive Laws, Propellant /Bondline Properties from Nondestructiv eEvaluation (NDE), Aging Mechanisms fo rPropellant/Bondlines . The third day(Thursday) will consist of program of-fice reviews of aging and surveillance pro -grams for major tactical and strategic mo -

tors . Small discussion groups will beformed on Thursday afternoon and Fri -day morning to discuss and prepare rec-ommendations for future work that wil lbe integrated into a single plan during theclosing session on Friday.

See the complete workshop invitatio nat http://www.jhu.edu/-cpia or contac tSylvia Gomez-Knight at (410) 992-7303 ,x203 or email at sjgomez@jhu .edu forfurther information .

Corrections

In the Reusable Launch Vehicle Propulsion Technology paper on page 5 of the November 1998 Bulletin issue, i tstates that "Removal of the engines allows parallel post-flight processing of the engines and orbiter(s) at the NAS ACanaveral Air Force Station Orbiter Processing Facility ." The post-flight processing is actually located at th eNASA Kennedy Space Center. Also, schematic 3 on page 7 was accidentally switched with schematic 4 on page 8 .

/

I

\We apologize for the error.

/

Page 6

CPIA Bulletin/Vol. 25, No . 1, January 1999

1998 Joint JANNAF EPTS and SPIRITS User Group Meetin gThe 2 4th JANNAF Exhaust Plume Technology Subcommittee (EPTS )

Meeting and 6 th Spectral and In-band Radiometric Imaging of Targets an dScenes (SPIRITS) User Group Meeting were jointly held November 9-13 ,1998 at the NASA Kennedy Space Center, Florida. The meeting was hostedby the National Aeronautics and Space Administration, with Mr . ChuckDavis (NASAIKSC) and Dr. Terry Greenwood (NASA/MSFC) serving a sthe meeting site hosts . Dr. Clark Mikkelsen (U.S . Army Aviation and Missil eCommand) served as the EPTS technical program Chairman, and Mr. BrianSandford (AFRL/HanscomAFB) served as the SPIRITS technical programChairman . Over 95 engineers, scientists, and program managers attended .

The EPTS Chairman, Dr. Clark Mikkelsen, opened the meeting with ashort welcoming address, and introduced the keynote speaker, Mr . RussellRhodes of NASA/KSC . Mr. Rhodes discussed how early versions of th eJANNAF Plume Codes were applied to develop Shuttle exhaust plume duc tdesign criteria for KSC and Vandenberg AFB launch complexes, and ho wtoday's JANNAF Plume Codes might be applied to develop major syste mattributes and characteristic design criteria for future commercial, civil, an dU .S . government space vehicles .

Over 45 papers were presented in seven technical sessions . The confer-ence also included two SPIRITS Code applications tutorials .

The EPTS technical program included 32 papers presented in five techni -cal sessions . Technical area topics included plume flowfield effects ; plum eflowfield and analysis studies ; plume applications and analysis ; theater bal -listic missile plume analysis ; and high altitude plume studies . Technical re -search efforts reported in the seven technical sessions strongly support th ecurrent needs of the tactical missile and theater missile defense communities ,and verified the improved accuracy of the JANNAF Plume Codes .

Missile defense interceptor divert thruster plumes are an area of increase dstudy interest . Plume effects introduce vehicle control issues at low altitudes ,and introduce sensor impacts at high altitudes, affecting threat detection andtracking capability. Significant progress has been reported in the prediction

and analysis of missile defense divert thruster systems . Characterizing The -ater Missile Defense (TMD) ballistic missiles is generating considerabl einterest in the plume technology community from both theoretical and ex -perimental activities.

Significant progress has also been made in improving the predictiv ecapability of exhaust plume afterburning and afterburning shutdown . Cur-rent JANNAF plume codes cannot capture the correct trends of missil esystems which exhibit a complex afterburning shutdown behavior. A cur-rent investigation showed that turbulent-chemistry interactions, flame ex -tinction and real engine effects play a major role in improving low altitudeafterburning predictions as well as accounting for complex shutdown behav -ior. Recommendations were made to incorporate these turbulent-chemistr yinteractions into the Standard Plume Flowfield (SPF-III) code .

The Aircraft Plume Flowfield and Hardbody Modeling (SPIRITS) pro -gram included 14 papers presented in two technical sessions . Two SPIRITSuser tutorials in a third session addressed body flowfield interactions o naircraft plume signatures, and modeling of non-standard conditions .

The Signature Panel Chairman, Mr Brian Sandford, opened the meetin gwith a welcome address, and chaired the Signatures Panel Meeting held a tthe conclusion of the technical sessions . The Signatures Panel chairma nannounced that AFRL/Hanscom AFB has released the SPIRITS-AClrlcode and F-16c, F-15E, and B-1 B aircraft modules to CPIA for distributio nto the user community . The SPIRITS-AC2r0 code is in final stages ofvalidation and assembly of the code documentation is on-going .

The Signatures Panel discussed standardization of a single active versio nof the SPIRITS code for UNIX and PC platforms, and associated outpu tdisplay issues . The SPIRITS code industry coordinator, Mr John Conant,Aerodyne Research, Inc ., presented an overview of code/user support an dtraining activities since the April 1997 EPTS conference . Code fixes intro-duced over the past 18 months and additional code support ideas for consid-eration by the panel and active users were discussed .

A New Look for the JPM . . .continuedfrompage 5

Workshop topics will be selected to be "cross-cutting and vision-ary." These workshops will be one-half day in length and be o ntopics of interest to more than one subcommittee . An example wouldbe a workshop on future technology needs, requirements and trends .

The afternoon of the middle day of the three-day JPM will be aplenary session in which each Subcommittee TSG Chairman pre-sents a report of his Subcommittee's activities . These presenta-tions will include the status of on-going tasks, planned activitiesand future technology needs and trends .

The third day of the three-day JPM will consist of concurrentGovernment briefings to industry on their in-house activities .Sessions will be selected by mission area. The idea is to have tech-nical presentations (not management presentations) to aid the tran-sition of the technologies to industry . This will meet the require-ment of the Integrated High Payoff Rocket Propulsion Technology

(IHPRPT) program to regularly brief industry on in-house work ,but the topics will not be limited to only those covered by IHPRPT ,but will include other areas of interest to JPM attendee s(airbreathing, guns, etc .) .

Every three years the JPM will be co-located with the AIAA JPC .These meetings will be two days in duration (Thursday and Fri -day), and the format will be the same as for the three-day JPM ,except the middle day (i .e ., Wednesday) program will be elimi-nated . That is, Subcommittee workshops and Subcommittee an-nual reports will only be presented every three years at the stand -alone JPMs .

The 1999 JPM call for papers will be mailed in January 1999 . I fyou do not receive your personal copy, please contact Ms . DebraEggleston at (410) 992-7300 x202 or e-mail : dse@jhu .edu .

CPIA Bulletin/Vol. 25, No. 1, January 1999

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CP Bu//etinA

Johns Hopkins University/Chemical Propulsion Information Agenc y10630 Little Patuxent Parkway, Ste . 202, Columbia, MD 21044-3204Phone (410) 992-730 0

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Official Business

JANNAF MEETING CALENDAR

1999 Meeting Type Location AbstractDeadline

PaperDeadline

Jan 14 JANNAF Airbreathing PropulsionSubcommittee Modeling andSimulation Workshop

Workshop Reno, NV N/A N/A

Mar 22-25 JANNAF Structures and MechanicalBehavior Subcommittee Service LifeWorkshop

Workshop Hill AFB, UT N/A N/A

Apr 26-30 1999 JANNAF Propellan tDevelopment and CharacterizationSubcommittee and Safety an dEnvironmental ProtectionSubcommittee Joint Meeting

Conference/Workshops

San Diego, CA Oct 16, 1998 Apr 9, 1999

Attendance at JANNAF Conferences and Workshops is by invitation only .

MEETING CALENDAR SUBJECT TO CHANGE . FOR LATEST DETAILS, CONTACT CPIA AT (410) 992-7304 .

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