SOME EFFECTS OF JET-COMPRESSOR GEOMETRY ON EFFICIENCY: COMPRESSION- RATIO CURVES WITH TWO MAXIMA

Abstract

Measurements were made with a new jet compressor of different geometry, and were compared with previous results. Efficiencies, compression ratios, and other data are presented for 5 systems of gases (He: Freon-113, He:CO2, air: Freon12, air: air, and Freon-12: air). Calculations of momentumflux balance within the mixing tube were made, and various results presented in a previous report are confirmed. Frictional losses in the mixing tube are shown for two different apparatuses, under several different operating conditions. The existence of two maxima in many of the curves of compression ratio versus outlet pressure is pointed out, and possible causes are discussed. A suggested cause of the second maximum is a rapid reduction shock loss in the driving stream, as the acceleration of this stream to a relatively high supersonic velocity is suppressed.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1964
Accession Number
AD0602200

Entities

People

  • Harold J. Hoge
  • Ronald A. Segars

Organizations

  • United States Army Soldier Systems Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Boundary Layer
  • Compression
  • Compression Ratio
  • Compressors
  • Efficiency
  • Engineering
  • Entrainment
  • Flow
  • Friction
  • Gas Meters
  • Geometry
  • Measurement
  • Molecular Weight
  • Momentum
  • Nozzles
  • Pressure Measurement
  • Reynolds Number

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Internal Combustion Engine (ICE) Technology.
  • Mechanical Engineering/Mechanics of Materials.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flow