Approximate Analysis of Heat Transfer in Transpired Boundary Layers at Limiting Prandtl Numbers

Abstract

A simple procedure is developed for approximate calculations of wall heat-transfer rates in transpired boundary layers. Applications of this procedure are illustrated by various examples of incompressible, laminar flows in the limits of large and small Prandtl numbers. A distinguished limit of large Prandtl number and small mass-transfer rate is easily identified, and some limiting solutions are presented for the porous-plate configuration. Calculations for the cases with small Prandtl numbers explicitly demonstrate the usefulness of the method in studying transient heat-conduction problems. The remarkable combination of accuracy and simplicity represents the principal merit of the method.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1974
Accession Number
AD0785239

Entities

People

  • Tse-fou Zien

Organizations

  • Naval Ordnance Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Layer Flow
  • Differential Equations
  • Equations
  • Flow
  • Flow Fields
  • Heat Flux
  • Heat Transfer
  • Heat Transfer Coefficients
  • Laminar Boundary Layer
  • Mass Transfer
  • Ordnance Laboratories
  • Prandtl Number
  • Skin Friction
  • Stagnation Point
  • Thermal Boundary Layer
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Systems Analysis and Design
  • Thermal Physics or Thermal Science.