ZERO SECONDARY FLOW EJECTOR-DIFFUSER PERFORMANCE USING ANNULAR NOZZLES

Abstract

An investigation was conducted to determine the performance of zero- secondary flow ejector diffuser systems using annular driving nozzles. Eight annular nozzles with various geometrics, including one expansion-deflection (E- D) nozzle, were tested in cylindrical diffusers having various diffuser lengths. The ejector starting and pumping characteristics were compared and found similar to the empirical relations developed for ejectors having conventional convergent-divergent nozzles. The unique problems associated with simulated altitude testing of the E-D nozzle and the effects of ejector diffuser design on E-D nozzle performance are discussed. A method is described for determining the ejector pumping characteristics when the ejector is unstarted to satisfy the annular nozzle test requirement for altitude simulation at conditions other than minimum cell pressure.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1963
Accession Number
AD0294138

Entities

People

  • H. K. Clark
  • J. H. Panesci
  • R. C. German

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Altitude
  • Annular Nozzles
  • Convergent Divergent Nozzles
  • Deflection
  • Diffusers
  • Equations
  • Exhaust Gases
  • Flow
  • Fluid Flow
  • Gages
  • Geometry
  • Mach Number
  • Measuring Instruments
  • Nozzles
  • Pressure Distribution
  • Secondary Flow
  • Static Pressure

Fields of Study

  • Engineering
  • Physics

Readers

  • Combustion and Flow Dynamics.