A SOLUTION FOR GAS-PHASE RECOMBINATION AND DISSOCIATION IN THE LAMINAR BOUNDARY LAYER OF A FLAT PLATE

Abstract

An existing theory for predicting the onset of dissociation in a laminar boundary layer is generalized and extended to account for dissociation in the boundary layer and gas-phase recombination near a cold wall. The existing theory shows that dissociation first occurs in a thin layer centered on the maximum temperature in the boundary layer. The present extension shows that for cold walls, there will be a dense layer near the wall with relatively long particle residence times to promote recombination. Hence, at least initially, the reacting boundary layer on a cold wall is characterized by a dissociation layer embedded in the boundary layer and a recombination layer near the wall. The theory is derived without specifying the gas model, and numerical results are given which are based upon a realistic gas model. It is shown that the effects of dissociation and recombination tend to compete, and under certain conditions the effects at the wall tend to cancel.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1970
Accession Number
AD0704546

Entities

People

  • Robert J. Vidal

Organizations

  • Calspan

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Abstracts
  • Aeronautical Laboratories
  • Air Force
  • Bodies
  • Boundary Layer
  • Chemical Reaction Properties
  • Chemical Reactions
  • Contracts
  • Equations
  • Flow
  • Heat Transfer
  • High Temperature
  • Laminar Boundary Layer
  • Rate Of Formation
  • Relaxation Time
  • Standards
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Fluid Mechanics and Fluid Dynamics.