THE COLLECTION OF A NORMALLY INCIDENT LOW DENSITY SUPERSONIC STREAM BY A CRYOGENIC SURFACE

Abstract

An experimental investigation was made to determine the amount of a low density supersonic (M approx. = 3) gas stream that will condense on a cryogenic surface at normal incidence. Nitrogen and argon flows up to .002 gm/ sec/sq cm. at total temperatures from 300 to 750K condensed on a liquid- or gaseous-helium-cooled plate. The amount collected was related to the stream properties and the heat transfer to the coolant. The analysis indicates that the cryosurface tends to a steady temperature at which the net rate of collection is the incident stream flux minus the evaporation rate for that temperature. This model provides a basis for the design of cryopumping geometries for low density directed flows such as jet plumes or wind tunnel nozzles.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1968
Accession Number
AD0663755

Entities

People

  • W. B. Stephenson

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Materials and Manufacturing Processes
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Boundary Layer
  • Cryopumping
  • Elements
  • Equations
  • Geometry
  • Heat Energy
  • Heat Of Vaporization
  • Heat Transfer
  • Heat Transfer Coefficients
  • Instrumentation
  • Low Density
  • Measurement
  • Pressure Gages
  • Pressure Measurement
  • Test Facilities
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Mathematics or Statistics

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flight
  • Hypersonics - Hypersonic Flow