Accession Number : AD0822092

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

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Heilala, Gary Alan

Report Date : MAY 1967

Pagination or Media Count : 60

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)

Descriptors :   (*SUPERSONIC COMBUSTION RAMJET ENGINES, FUEL INJECTION), (*RAMJET INLETS, SUPERSONIC COMBUSTION RAMJET ENGINES), EFFICIENCY, PERFORMANCE(ENGINEERING), WIND TUNNEL MODELS, MODEL TESTS, THESES, HELIUM, AERODYNAMIC CHARACTERISTICS, SCHLIEREN PHOTOGRAPHY, JET ENGINE FUELS.

Subject Categories : Fluid Mechanics
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE