Accession Number : AD0731475

Title :   Mixing Phenomena Related to C. W. Chemical Lasers.

Descriptive Note : Technical rept.,

Corporate Author : SCICOM INC HUNTSVILLE ALA

Personal Author(s) : Hayday,Alexander A.

Report Date : JUL 1971

Pagination or Media Count : 95

Abstract : The report concludes a brief preliminary study on mixing phenomena related to continuous wave chemical laser injector systems. It is largely a survey of existing information on mixing of high and low speed, turbulent, chemically active gases. Several different flows that may occur near the cavity entrance are identified and reliability of available mixing models is assessed. Two main configurations are treated: mixing of parallel streams and mixing in cross-flows. Factors affecting the rapidity of mixing are given. Topics on mixing of parallel flows include: (1) supersonic-subsonic interactions of isobaric jets of significantly different molecular weights; (2) influence of highly exothermic reactions and transverse pressure gradients; (3) effects of adverse pressure gradients and the possibility of wake flows with base bleeding; (4) limitatons of boundary layer mixing models. Interactions of perpendicularly oriented streams are discussed for both low speed flows and the case of a secondary jet issuing through a sonic orifice into a supersonic main stream. Methods for estimating penetration depth by the secondary jet are given and effectiveness of mixing in cross-flows is compared with the parallel flow configuration. (Author)

Descriptors :   (*GAS LASERS, NOZZLE GAS FLOW), BOUNDARY LAYER, FLOW FIELDS, FUEL INJECTORS, CHEMICAL REACTIONS, NUMERICAL ANALYSIS

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE