THE EFFECT OF EXTERNAL FUEL INJECTION ON THE FUEL-AIR MIXING EFFICIENCY AND INLET PERFORMANCE OF A SUPERSONIC COMBUSTION RAMJET ENGINE.

Abstract

The effect of external fuel injection on the fuel-air mixing efficiency and inlet performance of a scramjet engine was investigated experimentally. To this end, a series of tests were run in a Mach 3 wind tunnel in which helium was injected externally, at varied mass flow rates and at angles of 15, 45, and 90 degrees to the airflow, at a point forward of the inlet section of a two-dimensional scramjet model. Total pressure and helium volumetric concentration profiles were obtained. The results of the study indicate that, for external fuel injection in a scramjet engine having a two-dimensional, ramp inlet, the injection angle for optimum fuel mixing and inlet performance lies in the range from 5 to 20 degrees. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 01, 1967
Accession Number
AD0822092

Entities

People

  • Gary Alan Heilala

Organizations

  • Air Force Institute of Technology

Tags

DTIC Thesaurus Topics

  • Combustion
  • Engines
  • Flow Rate
  • Fuel Injection
  • Ignition Lag
  • Mass Flow
  • Ramjet Engines
  • Supersonic Combustion
  • Supersonic Combustion Ramjet Engines
  • Two Dimensional
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flow