Temperature and Pressure Sensing Systems

Abstract

IT HAS been found that the design of a good pressure or temperature sensing system requires more than choosing a sensing probe which has good internal performance and reproducibility. The external effects of the probe on its environment and the effects of the environment on the performance of the probe must always be considered. In fact, a good job usually requires complete knowledge of the flow pattern, flow boundaries, boundary layer thickness, Mach number range, pressure range, and temperature range. The design, development, and manufacture of individual probes, rakes, and complete integrated sensing systems have been the specialty of the Aero Research Instrument Company, Inc., for the past three years. ARi has also performed wind tunnel tests and calibrations on a contract basis and has developed instrument wind tunnels for other agencies. A typical example of the latter is a wind tunnel now under construction designed to operate at total temperatures to 4800 R and up to Mach 1.0 at static pressures from y 5 to 2 atmospheres. This is probably the highest temperature, continuous flow wind tunnel in existence.