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MEMS High Temperature Gradient Sensor for Skin-Friction Measurements in Highly Turbulent Flows

Abstract : This paper presents and discusses the results obtained with a MEMS (Micro-Electro-Mechanical System) high temperature gradient sensor for time-averaged and fluctuating skin-friction measurements in highly turbulent flows. Designed as a robust wall-mounted suspended hot-wire structure, the micro-sensor was made using conventional microfabrication techniques, compatible with microelectronics for designing integrated smart systems. Successfully implemented into two air wind tunnels, the sensor was tested in a large range of turbulent flows, with mainstream velocities going up to 270 m/s (Mach number of 0.79), which corresponds to the mean velocity of airliner cruise flights. The experiments demonstrated the wide dynamic range of the micro-sensor without reaching its limits. The micro-sensor thereby demonstrated its value for measuring turbulence in aerodynamic applications, being particularly suitable for aeronautics.
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https://hal.archives-ouvertes.fr/hal-03229029
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Submitted on : Tuesday, May 18, 2021 - 3:51:46 PM
Last modification on : Thursday, January 27, 2022 - 4:46:02 PM

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Cécile Ghouila-Houri, Abdelkrim Talbi, Romain Viard, Quentin Gallas, Eric Garnier, et al.. MEMS High Temperature Gradient Sensor for Skin-Friction Measurements in Highly Turbulent Flows. IEEE Sensors Journal, Institute of Electrical and Electronics Engineers, 2021, 21 (8), pp.9749-9755. ⟨10.1109/JSEN.2020.2991785⟩. ⟨hal-03229029⟩

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