HOT-WIRE HEAT LOSS AND FLUCTUATION SENSITIVITY FOR INCOMPRESSIBLE FLOW

Abstract

An experimental study of the forced convection heat loss from long thin cylinders placed normal to an incompressible flow was carried out. Tests were made in three different gases (air, argon, helium) at atmospheric pressure and in air over a pressure range 0.2 to 8 atm. Particular attention was given to determining the effect of cylinder temperature on the heat loss. It was found that the constants employed in the usual empirical representation of this heat loss vary with cylinder temperature in a way dependent on Knudsen number, results in helium giving a marked indication of this. A velocity fluctuation sensitivity equation was derived which includes the effects of this temperature variation.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1962
Accession Number
AD0276520

Entities

People

  • W. H. Webb

Organizations

  • Princeton University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Barometric Pressure
  • Boundary Layer
  • Fluid Dynamics
  • Fluid Mechanics
  • Gas Dynamics
  • Incompressible Flow
  • Knudsen Number
  • Measurement
  • Mechanical Properties
  • Physical Properties
  • Physics Laboratories
  • Reynolds Number
  • Square Roots
  • Stratified Fluids
  • United States

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Thermal Physics or Thermal Science.