Accession Number : ADA189609

Title :   Investigations into Shock-Induced Enhancement of Mixing and Combustion in Supersonic Burners.

Descriptive Note : Annual technical rept. 1 Oct 86-30 Sep 87,

Corporate Author : CALIFORNIA INST OF TECH PASADENA

Personal Author(s) : Marble, Frank E

PDF Url : ADA189609

Report Date : 04 Nov 1987

Pagination or Media Count : 23

Abstract : Modifications to three major facilities at Caltech, carried out in preparation for an extensive investigation of shock enhanced mixing and combustion in supersonic combustion ramjets, has progressed according to schedule. Work is complete on the GALCIT 17-inch shock tube and on the Unsteady Combustion Facility, and they are operating as planned. Extensive improvement of the optical diagnostics and data acquisition equipment for both of these is nearly complete. Design of the new heated-hydrogen leg for the Hydrogen/Fluorine facility has been simplified considerably from the original concept and is progressing satisfactorily. Extensive computational studies of the interaction between weak shock waves and isolated regions of hydrogen embedded in air has revealed a behavior which suggests that considerable technological advantage may accrue by the use of multiple weak shocks to enhance mixing. Keywords: Supersonic combustion; Vortex burning mixing; Shear layers vorticity generation; Shock enhanced mixing.

Descriptors :   *BURNERS, *SHOCK WAVES, *SUPERSONIC CHARACTERISTICS, *SUPERSONIC COMBUSTION, COMPUTATIONS, DATA ACQUISITION, DATA PROCESSING EQUIPMENT, DIAGNOSIS(GENERAL), FACILITIES, FLUORINE, HYDROGEN, ISOLATION, LAYERS, LOW INTENSITY, LOW STRENGTH, MIXING, OPTICAL ANALYSIS, SHEAR PROPERTIES, SHOCK(MECHANICS), SUPERSONIC COMBUSTION RAMJET ENGINES, VORTICES

Subject Categories : Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE