A Mixing Plane Model Investigation of Separation and Transitional Flow at Low Reynolds Numbers in a Multistage Low Pressure Turbine (Postprint)

Abstract

Steady flow CFD simulations of multistage LPT flow were completed at nominal and high altitude conditions with the conventional Spalart-Allmaras turbulence model. This model was used in combination with a mixing plane model for the simulation of flow through domains with one or more regions in relative rotational motion. Flow visualizations were completed using surface flow and streamline calculations to help identify vortical structures present within the flowfield. Also, the total pressure loss coefficient was calculated for each blade row. Qualitative comparisons indicate that the simulated high altitude condition had an increase in the amount of separated flow present within the flowfield compared to the nominal altitude condition.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2009
Accession Number
ADA520870

Entities

People

  • Darius D. Sanders
  • Douglas C. Rabe
  • Marc D. Polanka
  • Rolf Sondergaard
  • Walter F. O'brien

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • High Altitude
  • Reynolds Number
  • Steady Flow
  • Steady State
  • Three Dimensional
  • Turbines
  • Turbulence
  • Turbulent Flow
  • Turbulent Mixing
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Fluid Mechanics and Fluid Dynamics.