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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. Schmitz DLR - Institute of Propulsion Technology - Fan and Compressor. Introduction Axial compressor design The existing tools The design process Duct optimization

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Optimization of the process chain for the design of axial compressors W. Riéra, A. Schmitz

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  1. Optimization of the process chain for the design of axial compressors W. Riéra, A. Schmitz DLR - Institute of Propulsion Technology - Fan and Compressor

  2. Introduction Axial compressor design The existing tools The design process Duct optimization Fundamental principles for the duct optimization The duct optimization process From a duct to a 3D blade Automated profile optimization 3D blade creation Conclusion & outlook Contents Introduction

  3. Introduction Axial compressor design The existing tools The design process Duct optimization Fundamental principles for the duct optimization The duct optimization process From a duct to a 3D blade Automated profile optimization 3D blade creation Conclusion & outlook Contents

  4. 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 The existing tools Axial compressor design

  5. 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 The existing tools Axial compressor design

  6. The design process ParamVar / ACDC-1D MISES (solver for blade profiles) BladeGenerator (from profiles to a 3D blade) G3Dmesh (meshing) GMC (pre-processing) TRACE (solver) ACDC-2D or Ductflow Automatic optimization Axial compressor design

  7. Introduction Axial compressor design The existing tools The design process Duct optimization Fundamental principles for the duct optimization The duct optimization process From a duct to a 3D blade Automated profile optimization 3D blade creation Conclusion & outlook Contents

  8. 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 Fundamental principles for the duct optimization Duct optimization

  9. The duct optimization process Change geometrical values Modified mesh S2Generator Mesh modifier AutoOpti ACDC-2D solver Change flow turning Python program : Check geometry Bash script and Regions of interest : Check results UserDefinedRestriction UserDefinedFunction : Manage the geometrical changes Original mesh Computed solution Duct optimization

  10. Introduction Axial compressor design The existing tools The design process Duct optimization Fundamental principles for the duct optimization The duct optimization process From a duct to a 3D blade Automated profile optimization 3D blade creation Conclusion & outlook Contents

  11. Automated profile optimization Profile in MISES • Configuration 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 From a duct to a 3D blade

  12. 3D blade creation • 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 From a duct to a 3D blade

  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!

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