AN ANALYSIS OF SECOND-THROAT DIFFUSER PERFORMANCE FOR ZERO-SECONDARY- FLOW EJECTOR SYSTEMS

Abstract

A theoretical and experimental investigation was conducted to determine a method for predicting the starting pressure ratio for a zero-secondary-flow ejector system having a second-throat diffuser. The effects of second-throat contraction, location, and length on the ejector starting characteristics were investigated, and a method for predicting second-throat diffuser performance was developed using one-dimensional conservation equations. A comparison of both hot and cold flow data with the developed theory is obtained for both long and short second-throat diffusers. For example, the short second-throat theory deviated from the short second-throat experimental data by a maximum of 10.2 percent with an average deviation of 3.3 percent.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1963
Accession Number
AD0426336

Entities

People

  • J. H. Panesci
  • R. C. German

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Conductive Polymers
  • Creep
  • Diffusers
  • Ejectors
  • Equations
  • Experimental Data
  • Flow
  • Flow Fields
  • Mach Number
  • Measuring Instruments
  • Pressure Distribution
  • Secondary Flow
  • Static Pressure
  • Test Facilities
  • Throat
  • Wind Tunnels

Fields of Study

  • Engineering

Readers

  • Combustion and Flow Dynamics.