High-frequency temperature sensing

Wing Ng

doi:10.1117/12.210506

30 May 1995 High-frequency temperature sensing

Wing Ng

Proceedings Volume 2494, Sensing, Actuation, and Control in Aeropropulsion; (1995) https://doi.org/10.1117/12.210506
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

A high-frequency response dual hot-wire aspirating probe which can measure the time- resolved stagnation temperature and pressure in an unsteady high-speed gas flow is described. The probe consists of two coplanar constant temperature hot wires at different overheat ratios, operated in a channel with a choked exit. Thus, the constant Mach number by the wires is influenced only by free-stream total temperature and pressure. The probe was used in three separate experiments. The experiments include measurements of the flowfield at the exit of transonic fans during steady-state operation, measurements of turbulence intensity in the wake of a transonic turbine cascade, and measurements of the exit flowfield in a transonic core- compressor during rotating stall. The paper describes the performance of the probe in all three experiments. Brief descriptions of the experiments are given and exemplary data are presented.

Citation Download Citation

Wing Ng "High-frequency temperature sensing", Proc. SPIE 2494, Sensing, Actuation, and Control in Aeropropulsion, (30 May 1995); https://doi.org/10.1117/12.210506

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