A cooled-gas pyrometer for use in high-temperature gas streams
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Krause, Lloyd N↗
Engineering topics
Johnson, Robert C
Publications and source records attributed to Johnson, Robert C.
Experimental Study of Heat Transfer to Small Cylinders in a Subsonic, High-temperature Gas Stream
A Nusselt-Reynolds number relation for cylindrical thermocouple wires in crossflow was obtained from the experimental determination of time constants. Tests were conducted in exhaust gas over a temperature range of 2000 to 3400 R, a Mach number range of 0.3 to 0.8, and a static-pressure range from 2/3 to 1-1/3 atmospheres, yielding a Reynolds number range of 450 to 3000. The correlation obtained is Nu=(0.428 plus or minus 0.003) times the square root of Re* with average deviations of a single observation of 8.5 percent. This relation is the same as one previously reported for room-temperature conditions.
GASES, PROPERTIES↗