A STUDY OF HEAT TRANSFER CHARACTERISTICS OF HOT GAS IGNITION.
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 L/D tests are reproducibly coincident with the entrance data for longer L/D 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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 08, 1965
- Accession Number
- AD0611282
Entities
People
- L. W. Carlson
Organizations
- Rocketdyne