A sensing device is described that is used to measure steady-state convective heat-transfer rate in high-temperature, high-velocity gas streams. The device uses the measurement of axial heat conduction through a cylindrical plug, with one end of the plug at the stagnation point of a hemispheric ally shaped body exposed to the gas stream.nExperimental tests of three identical probes run through a subsonic Mach number range from 0.2 to 0.8 and a supersonic Mach number range of 2.8 to 3.5 established a correlation factor for the probes with a standard deviation of ±5 percent. The heat input range was 0.7 to 70 (Btu)(ft-2)(sec_1).
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