HEAT TRANSFER RATES IN THE VICINITY OF SURFACE PROTUBERANCES AT MACH 6.3
Abstract
Wind tunnel tests were conducted to determine the effects of various protuberances on heat transfer rates to a flat surface. The protuberance models included three cylinders inclined 45 degrees backward, two cylinders inclined 45 degrees forward, two cylinders normal to the flow, one semicone-afterbody and one wedge-afterbody model. Tests were performed at Mach 6.3 and at gas total temperature of 4350R. The degree and the lateral extent of disturbances produced by cylindrical protuberances depend on the protuberance orientation with respect to the flow. Models inclined forward produced the highest heating rates while models inclined backward produced the lowest. Cylindrical protuberances inclined 45 degrees backward produced no significant increase in heating rates upstream of the models. Models in normal or forward facing orientation produced an increased heating rate area that extends approximately 2-1/2 protuberance diameters upstream. The highest heating rate region in the vicinity of cylindrical protuberances inclined 45 degrees backward occurred along the lines that are trailing the models at approximately 10 degrees with respect to the plate centerline. Cylindrical protuberances in normal and forward-facing attitudes produced the highest heating rates just upstream of the models. The highest heating rates, about 40 times the undisturbed value, occurred upstream of the forward-facing cylindrical protuberances.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 10, 1961
- Accession Number
- AD0664597
Entities
People
- F. P. Baltakis
Organizations
- General Dynamics