EXPANSION OF A JET INTO NEAR VACUUM

Abstract

The flow field of nozzles exhausting into a vacuum was investigated both analytically and experimentally. The applicability of the method of characteristics for jet expansions into a free molecular environment is discussed. Fifteen-degree, half-angle, conical nozzles with area ratios of 1.0 to 207 were tested with argon and nitrogen at total pressures of 100, 50, and 35 psia. Ambient pressures of .0001 to .000001 torr yielded total pressure to ambient pressure ratios of 10,000,000 to 1,000,000,000. Properties of the flow field were determined by the use of flat plates and flow direction vanes.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1965
Accession Number
AD0469041

Entities

People

  • R. A. Cassanova
  • W. B. Stephenson

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Boundaries
  • Boundary Layer
  • Coefficients
  • Condensation
  • Conical Nozzles
  • Flow
  • Flow Fields
  • Heat Energy
  • Heat Transfer
  • Knudsen Number
  • Mach Number
  • Method Of Characteristics
  • Specific Heat
  • Transitions
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.