A Gamma-kL Transition Model for Transitional Flow with Pressure Gradient Effects

  • Ekachai Juntasaro King Mongkut’s University of Technology North Bangkok
  • Abdul Ahad Narejo King Mongkut’s University of Technology North Bangkok

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Abstract

A new and complete version of the gamma-kL transition model has been continually developed and proposed in the present paper. This version of the gamma-kL transition model can predict the effects of pressure gradient on the mean flow. The gamma-kL transition model is validated with the ERCOFTAC T3- and T3C-series experimental data of Coupland [1]. The validation shows that the computed results of the gamma-kL transition model are in good agreement with the experimental data. The performance of the gamma-kL transition model is assessed in comparison with those of the kL transition model of Walters and Cokljat [2], the gamma-Re_theta transition model of Langtry and Menter [3], and the gamma transition model of Ge et al. [4] in case of the transitional flow through the compressor blade passage of Zaki et al. [5]. It is found that the proposed gamma-kL transition model is the only transition model that can consistently capture the separation bubble on the compressor blade.

Author Biographies
Ekachai Juntasaro

Department of Mechanical and Process Engineering, the Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand

Abdul Ahad Narejo

Department of Mechanical and Process Engineering, the Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand

Keywords
RANS, transition model, intermittency, laminar kinetic energy, pressure gradient.

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