AN INVESTIGATION OF EJECTOR SYSTEMS USING VERY LARGE DIFFUSERS

Abstract

An experimental investigation was conducted to determine the characteristics of ejector systems using very large cylindrical diffusers. Tests were conducted with nitrogen, carbon dioxide, and helium gases in systems having diffuser cross section to nozzle throat area ratios from 950 to 15,300. Limited effects of ejector nozzle configuration, diffuser length, system size, and diffuser wall cooling were investigated. Excellent system performance was obtained, with test cell altitudes of 250,000 ft being produced by the pumping action of the ejector at nozzle total pressures of approximately 100 to 200 psia.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1968
Accession Number
AD0678522

Entities

People

  • R. D. Herron

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Altitude
  • Carbon Dioxide
  • Cooling
  • Diffusers
  • Engineering
  • Exhaust Diffusers
  • Gas Turbine Nozzles
  • High Altitude
  • Mach Number
  • Nitrogen
  • Nozzles
  • Propulsion Systems
  • Reynolds Number
  • Specific Heat
  • Vacuum Chambers
  • Wind Tunnels

Fields of Study

  • Engineering
  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Molecular Photonics/Laser Physics
  • Rocket Propulsion.