The Development of a Temperature Measuring Probe for Use in a Two-Phase (Gas-Liquid) Environment

A series of aspirating thermocouple probes was designed and built to measure the gas temperature in a two-phase (gas-liquid) system similar to that encountered in a jet engine exhaust gas spray color. These probes were tested over a wide range of flow conditions to determine the probe performance and to determine the influences of probe size, relative flow angle, and aspiration pressure ratio on the temperatures measured by the probe. The final configuration of the aspirating thermocouple measured the gas phase temperature over the range from 710 to 81 degrees R when operating at liquid-to-gas flow rates from 0.13 to 2.3, at 13.0-psia pressure and free-stream Mach numbers in the range from 0.05 to 0.08. (Author) Prepared in cooperation with ARO, Inc., Tullahoma, Tenn. Rept. no. ARO-ETF-TR-71-228.