Measurement of turbulent fluctuations in high-speed flows using hot wires and hot films | Zendy

Mukund Acharya | Zendy

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Measurement of turbulent fluctuations in high-speed flows using hot wires and hot films

Author(s) -

Mukund Acharya

Publication year - 1979

Publication title -

review of scientific instruments

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.605

H-Index - 165

eISSN - 1089-7623

pISSN - 0034-6748

DOI - 10.1063/1.1135976

Subject(s) - turbulence , supersonic speed , wind tunnel , calibration , boundary layer , mechanics , materials science , anemometer , wind speed , supersonic wind tunnel , temperature measurement , physics , meteorology , thermodynamics , quantum mechanics

A hot wire has a limited life in high-speed wind-tunnel flows because it is typically subjected to large dynamic loads. As a consequence hot films and modified hot wires are frequently used for turbulence measurements in such flows. However, the fluctuation sensitivities of such probes are reduced because of various factors, leading to erroneous results. This paper described the results of tests on some sensors in both subsonic and supersonic boundary-layer flows. A simple technique to determine dynamic calibration correction factors for the sensitivities is also presented.

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