Interaction of Isotropic Turbulence with a Shock Wave

Abstract

As a first step to understand the compressibility effects, interaction of isotropic quasi-incompressible turbulence with a weak shock wave was studied by three-dimensional time-dependent direct numerical simulations. In addition, linear analysis was used to study interaction of isotropic turbulence with shock waves of a wide range of strengths. The effects of the fluctuation Mach number M sub t and the average Mach number M sub 1 superscript u of the upstream turbulence on turbulence statistics were investigated. Both numerical simulations and linear analyses of the interaction show that turbulence is enhanced during the interaction with a shock wave. Turbulent kinetic energy (TKE) and transverse vorticity components are amplified, and turbulent length scales are decreased. The predictions of the linear analyses compare favorably with simulation results for flows with M sub t < M sub 1 superscript U-1, which suggests that the amplification mechanism is mainly linear.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1992
Accession Number
ADA250409

Entities

People

  • P. Moin
  • S. K. Lele
  • Shang‐Fan Lee

Organizations

  • Stanford University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boltzmann Equation
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Convection
  • Databases
  • Differential Equations
  • Energy Transfer
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Geometry
  • Heat Transfer
  • Mach Number
  • Mechanical Properties
  • Three Dimensional
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.