Engineering Design Centre Blade Design for Axial Compressors ...
Optimization of the process chain for the design of axial compressors W. Riéra, A. Schmitz
description
Transcript of Optimization of the process chain for the design of axial compressors W. Riéra, A. Schmitz
Optimization of the process chain for the design of axial compressors
W. Riéra, A. SchmitzDLR - Institute of Propulsion Technology - Fan and Compressor
2
Contents
Introduction
I. Axial compressor design1. The existing tools2. The design process
II. Duct optimization1. Fundamental principles for the duct optimization2. The duct optimization process
III. From a duct to a 3D blade1. Automated profile optimization2. 3D blade creation
Conclusion & outlook
Introduction
3
Contents
Introduction
I. Axial compressor design1. The existing tools2. The design process
II. Duct optimization1. Fundamental principles for the duct optimization2. The duct optimization process
III. From a duct to a 3D blade1. Automated profile optimization2. 3D blade creation
Conclusion & outlook
4
The existing tools
Axial compressor design
ACDC-2D (Advanced Compressor Design Code)
Solves the differential equations of the radial equilibrium and the continuity equation of a duct
Correlations for :• the total pressure losses • the deviation for a profile
Second order computation
Real gas module in option
Still in development…
Writes the boundary conditions and the first draft profiles for MISES
5
The existing tools
Axial compressor design
MISES
Solver for airfoils in cascades from the M.I.T.
Coupled viscous / inviscid Eulermethod for profile design
AutoOpti
Automatic optimizer from the DLR
Based on an evolutionary algorithm
6Axial compressor design
The design process
ParamVar / ACDC-1D
ACDC-2Dor Ductflow
MISES(solver for blade profiles)
BladeGenerator(from profiles to a 3D blade)
G3Dmesh(meshing)
GMC (pre-processing)TRACE (solver)
Automatic optimization
7
Contents
Introduction
I. Axial compressor design1. The existing tools2. The design process
II. Duct optimization1. Fundamental principles for the duct optimization2. The duct optimization process
III. From a duct to a 3D blade1. Automated profile optimization2. 3D blade creation
Conclusion & outlook
8Duct optimization
Fundamental principles for the duct optimization
Find the best duct configuration : • Increase the pressure ratio for the compressor• Decrease losses
by changing :• The duct geometry• The flow turning of each blade (input for ACDC-2D)
Based mainly on already existing tools
9Duct optimization
The duct optimization process
UserDefinedRestrictionUserDefinedFunction :
Manage the geometrical changes
Python program :Check geometry
Bash script and Regions of interest :
Check results
ACDC-2D solver
S2Generator Mesh modifier
Changeflow turning
Change geometrical
values
Original mesh
Modified mesh
Computed solution
AutoOpti
10
Contents
Introduction
I. Axial compressor design1. The existing tools2. The design process
II. Duct optimization1. Fundamental principles for the duct optimization2. The duct optimization process
III. From a duct to a 3D blade1. Automated profile optimization2. 3D blade creation
Conclusion & outlook
11
Automated profile optimization
From a duct to a 3D blade
Profile in MISESConfiguration settings automated for a profile
optimization with AutoOpti•Fits the boundary conditions •Adapts to the geometry of each profile
Automatic launch of the optimization on the cluster •Reduce the losses•Reach the required exit angle from ACDC-2D
Second operating point available in option
Optional : export only one k-line and/or one blade
12
3D blade creation
From a duct to a 3D blade
Post processing
Use the optimized profiles and BladeGenerator to create a 3D blade
3D blades are adapted to the duct and ready for a 3D computation
13
Outcome :
A program for the parameter study of axial compressors was written and implemented in ACDC-1D.
The preliminary compressor design was optimized with :• a process chain for a duct optimization • an automated profile optimization• an automated creation of 3D blades from the optimized profiles
Next steps :
Focus on the post processing
Implement other options for users and improve the code
Intensive tests on different compressor configurations
Conclusion & outlook
14
Thank you for your attention!