Turbulence Modeling for Thrust Reverser Flow Field Prediction Methods

Abstract

The use of thrust reversing on aircraft operating in ground effect produces complex flow fields, for which conventional turbulence models are inadequate. The main objective of the work was to produce an improved turbulence model. The work included experimental measurements of an impinging jet inclined 45 degrees into the crossflow. Large eddy simulation (LES) was used to identify the dominant turbulent physics in these flows and to guide the development of an improved k-E model for Reynolds-averaged calculations. Modifications to the k-E model for the effects of streamline curvature and vortex stretching (lateral divergence) were used. Compared to the original k-E model, the modified model reduced by as much as 70 percent the errors in predicting the ground vortex location. Impinging jets, Turbulence modeling, Computational fluid, Dynamics.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1992
Accession Number
ADA266139

Entities

People

  • Laura C. Rodman
  • Peter Bradshaw
  • Robert E. Childs

Organizations

  • Nielsen Engineering & Research (United States)

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Flow Fields
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Geometry
  • Ground Effect
  • Large Eddy Simulation
  • Mathematical Models
  • Measurement
  • Mechanical Properties
  • Pressure Distribution
  • Pressure Measurement
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Aerospace Engineering
  • Computational Fluid Dynamics (CFD)
  • Fluid Mechanics and Fluid Dynamics.