MEASUREMENTS OF LOCAL HEAT-TRANSFER RATE ON A COOLED SHARP FLAT plate in the merged layer flow regime
Final rept. Aug-Nov 1968
ARO INC ARNOLD AFS TN
Pagination or Media Count:
Results of measurements of the local convective heat-transfer rate on a sharp-leading-edge flat plate at various angles of attack and in the merged layer flow regime are presented. The measurements were obtained using a phase- change temperature-sensitive paint, which greatly simplifies instrumentation requirements, and these measurements were checked using conventional heat- transfer instrumentation. Data obtained on the windward surface at 0-, 10-, and 20-deg angle of attack are compared to theoretical predictions. The data demonstrate the feasibility of utilizing phase-change temperature-sensitive paint in place of conventional heat-transfer instrumentation in low-density high-speed flows. The data at large angles of attack wedge angles are shown to correlate in the same manner as the zero angle-of-attack data when local inviscid flow parameters are utilized. Based on local inviscid values, the data are in the Mach number range from 4 to 10 and viscous interaction parameter ranges from 0.06 to 0.80. A strong Mach number influence as well as the nonexistence of a definable strong interaction flow regime in this Mach number range was noted.
- Fluid Mechanics