Accession Number : AD0635255

Title :   TWO-DIMENSIONAL JET MIXING IN A SUPERSONIC FLOW.

Descriptive Note : Master's thesis.

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

Personal Author(s) : Johnson, Donald Edwin

Report Date : APR 1966

Pagination or Media Count : 80

Abstract : The two-dimensional turbulent mixing region, resulting when a near sonic helium jet impinges at 30, 45 or 60 degrees on a supersonic air stream, was experimentally investigated utilizing an interferometer, a gas analyzer, and a total pressure rake. This type of mixing has a possible application in the supersonic combustion ramjet engine. Volumetric concentration profiles and a total pressure map of the mixing region were obtained for each injection angle. The mixing obtained for each injection angle was compared with that obtained with other injection systems. The techniques used for spark lamp photography are discussed. It was concluded that the interferometer cannot be focused so that fringes can be obtained throughout the mixing region at one interferometer setting. Many photographs at different interferometer settings would be required to determine the density distribution in the mixing region for gases having an extreme density difference. (Author)

Descriptors :   (*JET MIXING FLOW, COMBUSTION), (*RAMJET ENGINES, JET MIXING FLOW), TWO DIMENSIONAL FLOW, SUPERSONIC FLOW, INJECTION, DENSITY, DISTRIBUTION, HELIUM, INTERFEROMETERS

Subject Categories : Fluid Mechanics
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE