Compact Transpiration Cooling Free-Jet Test Results and Comparison with Theory.
Abstract
A series of free-jet tests has been carried out to obtain experimental data for use in evaluating the accuracy of a Compact Transpiration Cooling computer program. Nominal test conditions were Mach 2, 115 psia total pressure, and 500F total temperature. The test model was a flat plate with partially semicylinder leading edge; nitrogen gas was used as the transpirant. Tests were carried out for a wide range of coolant flow rates and the results correlated with theory. Good agreement was obtained between measured and computed results of plenum pressure variation, porous surface temperatures without transpiration cooling, and solid surface temperatures for all runs. However, the predicted temperatures for the stagnation line on the porous matrix surface were consistently lower than the measured values. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1972
- Accession Number
- AD0753109
Entities
People
- Robb W. Newman
Organizations
- Johns Hopkins University Applied Physics Laboratory