Geometri af V indmølle rotor og Skibspropeller
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Transcript of Geometri af V indmølle rotor og Skibspropeller
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Technical University of Denmark
Af: Robert Mikkelsen
Geometri af Vindmølle rotor og Skibspropeller
Indhold• Flow gennem rotorer• Hastigheds trekanter• Skibs propeller blad • Vindmølle blad
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Wake states – Navier Stokes – Actuator Disc
Propeller : CT= 3Turbine : CT= -0.8Turbulent – Vortexring state : CT= -
1.3
Technical University of Denmark
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Technical University of Denmark
Propeller skrue – Pitch - Stigning
International Towing Tank Committee (ITTC)
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Technical University of Denmark
Hastigheds Trekant for Propeller Rotor
w
wt
Vo+wax
φ
Ωr
Vrel
φ
φ1
L
Ftan
Fax
0)( FeV r
Vo
Pitch
Rotorplan
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Technical University of Denmark
Vinkler
International Towing Tank Committee (ITTC)
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Technical University of Denmark
Hastigheds Trekant for Mølle Rotor
w
wt
Vo-wax
φ
Ωr
Vrel
φ
φ1
L
Ftan
Fax
0)( FeV r
Vo
Rotorplan
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Technical University of Denmark
Reference Linje i Propeller Blad
International Towing Tank Committee (ITTC)
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Technical University of Denmark
Skew Propeller
International Towing Tank Committee (ITTC)
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Technical University of Denmark
Rake - Koning
International Towing Tank Committee (ITTC)
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Technical University of Denmark
Profiler
NACA
RAF
Eppler
Wortmann(svævefly)
Udvalgte profiler
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Technical University of Denmark
Conventionel propeller
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Technical University of Denmark
LM 19m vindmølle vinge
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Technical University of Denmark
High skew propeller
][~2~cos~sin~
][~2~sin~cos~
21
21
0
mRiRcyxz
mRrRcyxc
Rake
rpp
Skew
S
Skew
SoChord
pPitch
p
][~2
~tan,][2 1 rad
rpmRD
r
c
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Technical University of Denmark
High skew propeller
][
][~sin~
][~cos~
mzz
mRrcRry
mRrcRrx
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Technical University of Denmark
CFD på High skew propeller
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Technical University of Denmark
CFD på High skew propeller
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Technical University of Denmark
Opgave - High skew propeller
Highskewlay.dat r/R pitch chord Skew rake bagkant forkant 2.9466e-001 1.7957e+000 1.6044e-001 0.000e+000 0.0000e+000 -1.6044e-001 1.6044e-001 3.1670e-001 1.8741e+000 1.9025e-001 7.0776e-003 -1.5315e-002 -1.8317e-001 1.9733e-001 3.3874e-001 1.9355e+000 2.1918e-001 1.5189e-002 -2.8642e-002 -2.0399e-001 2.3437e-001 . . . . . .
. . . . . .
. . . . . .
Highskewprofiles.dat xp(1) yp(1) xp(2) yp(2) xp(3) yp(3) .......1.00000000E+00 6.65346802E-17 1.00000000E+00 0.00000000E+00 1.00000000E+00 ……. 9.99944068E-01 1.52207242E-04 9.99939286E-01 1.44388281E-04 9.99925098E-01 ……. 9.99861592E-01 3.43726187E-04 9.99847067E-01 3.22631039E-04 9.99813139E-01 ……. . . . . . .
. . . . . .
. . . . . .
• Generer propeller overfladeData: highskewlay.dat,
highskewprofiles.dat