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30 May 1995 High-frequency temperature sensing
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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.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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