Turbulence modeling for low pressure turbine blades

A. Gross, H. F. Fasel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Laminar flow separation from Low Pressure Turbine (LPT) blades at low operating Reynolds numbers can limit the operating envelope of jet engines. After separating from the suction side of the blade, the flow transitions to turbulence and may or may not reattach. Many intriguing questions about the interaction between separation and transition still remain unanswered, complicating any turbulence modeling effort. When the Reynolds number is low enough, the flow lends itself to Direct Numerical Simulations (DNS). Two-dimensional Reynolds-Averaged Navier-Stokes (RANS) calculations promise to be a low cost alternative to DNS. They may also allow for computations at Reynolds numbers too high for DNS. Turbulence modeling of transitional flows is still an unresolved issue. In this paper, different turbulence models will be employed for predicting the separating and transitional flow on an LPT blade. In addition, results from an Implicit Large Eddy Simulation (ILES) and a Flow Simulation Methodology (FSM) simulation are presented. The numerical results are compared with experimental data.

Original languageEnglish (US)
Title of host publication35th AIAA Fluid Dynamics Conference and Exhibit
StatePublished - Dec 1 2005
Event35th AIAA Fluid Dynamics Conference and Exhibit - Toronto, ON, Canada
Duration: Jun 6 2005Jun 9 2005

Publication series

Name35th AIAA Fluid Dynamics Conference and Exhibit

Other

Other35th AIAA Fluid Dynamics Conference and Exhibit
CountryCanada
CityToronto, ON
Period6/6/056/9/05

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ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Aerospace Engineering

Cite this

Gross, A., & Fasel, H. F. (2005). Turbulence modeling for low pressure turbine blades. In 35th AIAA Fluid Dynamics Conference and Exhibit (35th AIAA Fluid Dynamics Conference and Exhibit).