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Advanced Numerical Setup for Separation-Induced Transition on High-Lift Low-Pressure Turbine Flows Using the γ-Rθt~ Model

[+] Author Affiliations
Alexandre Minot

Safran-Snecma, Moissy-Cramayel, France

Xavier de Saint Victor, Jean Perraud

ONERA, Toulouse, France

Julien Marty

ONERA, Meudon, France

Paper No. GT2015-42160, pp. V02BT39A010; 12 pages
doi:10.1115/GT2015-42160
From:
  • ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
  • Volume 2B: Turbomachinery
  • Montreal, Quebec, Canada, June 15–19, 2015
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5664-2
  • Copyright © 2015 by ASME

abstract

This paper presents RANS computation results on the highly-loaded low-pressure turbine blade T106C using the Display Formulaγ-Rθt~ transition model. First, a setup methodology is described, addressing key points such as inlet values for the turbulence variables and stagnation point anomaly. This setup yields good results overall using the transition model in its standard form. The model is then extended to other turbulence model and other correlation functions and results are discussed. It is found that the best overall compromise between precision and trends is obtained through the use of Langtry et al.’s correlation for the transition Reynolds number and Content et al.’s pair of correlations for transition length and critical Reynolds number. However, this paper is more about giving the reader details on the behavior of the Display Formulaγ-Rθt~ model than finding the best combination of parameters.

Copyright © 2015 by ASME

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