Accession Number:

AD0611282

Title:

A STUDY OF HEAT TRANSFER CHARACTERISTICS OF HOT GAS IGNITION.

Descriptive Note:

Quarterly progress rept. no. 3 for period ending 31 Jan 65,

Corporate Author:

ROCKETDYNE CANOGA PARK CALIF

Personal Author(s):

Report Date:

1965-02-08

Pagination or Media Count:

25.0

Abstract:

34 RECORDED HEAT TRANSFER TESTS WERE PERFORMED. A number of interesting heat transfer effects were observed as follows 1 developed heat transfer matches Dittus-Boelter type correlations, 2 transient heat transfer exists within the test section for a time duration of a large fraction of a second, 3 heat transfer maxima related to periodic shock phenomena within the test section chamber can occur, 4 data from shorter LD tests are reproducibly coincident with the entrance data for longer LD test sections, except for exit nozzle shock effects which persist in some cases for approximately two diameters back into the test section, 5 L, the nozzle extension distance within the test section, is not a significant parameter it merely shifts the entire heat transfer distribution, 6 the exhaust area ratio is a significant parameter in determining the heat transfer level the effect is related to jet aspiration or pressurization of the test chamber volume, 7 an axial head end super-sonic nozzle optimum expansion shifts the point of maximum heat transfer downstream to the center of the test section, while maintaining equivalent integrated heat transfer, compared with sonic igniter nozzles greater shock disturbances were noted for the supersonic igniter nozzle at the aft end of the test section than were noted for the sonic igniter nozzle. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE