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Numerical Optimization of Compressor Casing Treatments for Influencing the Tip Gap Vortex

In: High Performance Computing in Science and Engineering, Garching/Munich 2007

Author

Listed:
  • Oliver Borm

    (Lehrstuhl für Flugantriebe)

  • Florian Danner

    (Lehrstuhl für Flugantriebe)

Abstract

Different axially oriented casing treatments were developed and tested numerically. Their influence on the flow of an axial transonic compressor stage was investigated by means of unsteady simulations. Total pressure ratio as well as efficiency were increased along the entire design speed line by applying cavities to the original geometry of the compressor. Due to a reduction of blockage, which is induced by the tip gap vortex, the stable operating range could be increased significantly. Furthermore the Non-Linear Harmonic Method (NLHM) was applied to compute the compressor flow. The results were compared to the numerical solution of the unsteady Navier-Stokes equation using the Spalart-Allmaras turbulence model. Therefore the unsteady results were transformed into the frequency domain by means of a Fast Fourier Transformation. The accounted frequencies were reduced to the ones included in the NLHM approach and compared to the corresponding results.

Suggested Citation

  • Oliver Borm & Florian Danner, 2009. "Numerical Optimization of Compressor Casing Treatments for Influencing the Tip Gap Vortex," Springer Books, in: Siegfried Wagner & Matthias Steinmetz & Arndt Bode & Matthias Brehm (ed.), High Performance Computing in Science and Engineering, Garching/Munich 2007, pages 215-225, Springer.
    • Handle: RePEc:spr:sprchp:978-3-540-69182-2_17
    DOI: 10.1007/978-3-540-69182-2_17
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