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The Effect of wake Turbulence Intensity on Transition in a Compressor Cascade

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Abstract

Direct numerical simulations of separating flow along a section at midspan of a low-pressure V103 compressor cascade with periodically incoming wakes were performed. By varying the strength of the wake, its influence on both boundary layer separation and bypass transition were examined. Due to the presence of small-scale three-dimensional fluctuations in the wakes, the flow along the pressure surface undergoes bypass transition. Only in the weak-wake case, the boundary layer reaches a nearly-separated state between impinging wakes. In all simulations, the flow along the suction surface was found to separate. In the simulation with the strong wakes, separation is intermittently suppressed as the periodically passing wakes managed to trigger turbulent spots upstream of the location of separation. As these turbulent spots convect downstream, they locally suppress separation.

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Author notes

  1. Tamer A. Zaki

    Present address: Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA

Authors and Affiliations

  1. School of Engineering and Design, Brunel University, Uxbridge, UB8 3PH, London, UK

    Jan G. Wissink

  2. Department of Mechanical Engineering, Imperial College, Kensington, SW7 2AZ, London, UK

    Tamer A. Zaki

  3. Institute for Hydromechanics University of Karlsruhe, Kaiserstr. 12, D-76128, Karlsruhe, Germany

    Wolfgang Rodi

  4. King Abdulaziz University, Jeddah, Saudi Arabia

    Wolfgang Rodi

  5. Aerospace Engineering, Iowa State University, Ames, IA, USA

    Paul A. Durbin

Authors
  1. Jan G. Wissink
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  2. Tamer A. Zaki
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  3. Wolfgang Rodi
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  4. Paul A. Durbin
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Corresponding author

Correspondence to Jan G. Wissink.

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Wissink, J.G., Zaki, T.A., Rodi, W. et al. The Effect of wake Turbulence Intensity on Transition in a Compressor Cascade. Flow Turbulence Combust 93, 555–576 (2014). https://doi.org/10.1007/s10494-014-9559-z

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  • DOI: https://doi.org/10.1007/s10494-014-9559-z

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