THE EFFECTS OF CONDENSATION ON THE FLOW FIELD PROPERTIES IN FREE-JET EXPANSIONS OF ARGON

Abstract

Molecular beam techniques and a time-of-flight velocity distribution detector system were used to investigate the effects of condensation in free-jet expansions of argon. A 1-in.-diam skimmer cooled to 22K was used to eliminate skimmer interaction. The data reported are for 170, 300, and 600K argon expanded into a vacuum from source pressures of from 10 to 10,000 torr and with a nozzle- skimmer separation distance of 650 nozzle diameters. The data revealed that the terminal velocity of the monomer species can be greater than predicted when condensation occurs. This is hypothesized to be the result of the heat of condensation being added to the flow field. Also, when condensation occurs, the static temperature increases. Terminal speed ratios as high as 27.5 were measured during these tests.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1970
Accession Number
AD0710616

Entities

People

  • E. C. Ruby
  • M. R. Busby
  • R. F. Brown

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Critical Temperature
  • Detectors
  • Diameters
  • Energy
  • Field Effect Transistors
  • Flow
  • Flow Fields
  • Heat Energy
  • Latent Heat
  • Mach Number
  • Mass Spectrometers
  • Measurement
  • Molecular Beams
  • Stagnation Temperature
  • Vapor Pressure

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Marine Ecotoxicology
  • Molecular Photonics/Laser Physics