Integral Analysis of Ducted Two-Stream Mixing with Recirculation

Abstract

The integral boundary-layer equations are used to develop an analysis of ducted turbulent mixing of coaxial streams. Non-recirculating flows, as well as flows with a recirculation region along the duct wall, are considered in the formulation. The flow geometry considered is either axisymmetric or planar, and provision is made to calculate flows with a centerbody. Chemical reactions in the mixing process, if they occur, are assumed to be in equilibrium. A simple eddy viscosity model is used to describe the turbulent transport processes. Comparison of the analytical results with experiments indicates that the location and extent of recirculation are well predicted, at least for flows with moderate density gradients. However, because of the neglect of streamwise turbulent transport processes in the analysis, the predicted concentration field in recirculating flow is in only fair agreement with experiment. An extended integral analysis, in which the streamwise turbulent transport of momentum and species is included in an approximate manner, is formulated.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1978
Accession Number
ADA053053

Entities

People

  • C. E. Peters
  • W. J. Phares

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Axisymmetric Flow
  • Boundary Layer
  • Chemical Reactions
  • Combustion
  • Computational Fluid Dynamics
  • Differential Equations
  • Engineering
  • Equations
  • Flow Fields
  • Fluid Dynamics
  • Mixing
  • Pressure Distribution
  • Secondary Flow
  • Stratified Fluids
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Mechanics and Fluid Dynamics.