Loading [MathJax]/extensions/MathZoom.js
MEMS high temperature gradient sensor for skin-friction measurements in highly turbulent flows | IEEE Conference Publication | IEEE Xplore

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 high temperature gradient sensor for time-averaged and fluctuating skin-friction measurements in highly...Show More

Abstract:

This paper presents and discusses the results obtained with a MEMS 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 showed a high temperature variation for low power consumption. Successfully implemented into two air wind tunnels, the sensor was tested for velocities going up to 270 m/s, mean velocity of airliner cruise flights, and corresponding to a shear stress of 150 Pa. The microsensor thereby demonstrated its value for measuring turbulence in aerodynamic applications, particularly in aeronautics.
Published in: 2019 IEEE SENSORS
Date of Conference: 27-30 October 2019
Date Added to IEEE Xplore: 14 January 2020
ISBN Information:

ISSN Information:

Conference Location: Montreal, QC, Canada

I. Introduction

Turbulence has been a complex field of study for fluid mechanics since its introduction in 1933 by O. Reynolds. It is indeed characterized by a disorderly behaviour with vortices whose size, location and orientation constantly vary. In fact, understanding, predicting and controlling turbulence are the three major goals of research in this domain. The consequences are crucial: predicting the behaviour of turbulent flows in order to control and manipulate them would, in many fields of application, save energy, improve systems performances and protect the environment [1]. The most obvious example is the one of transport industry, which is confronted to the problem of aerodynamic drag on vehicles. Controlling turbulence for this application means manipulating the laminar-turbulent transition of the flow around the vehicle, controlling the phenomenon of separation of the boundary layer or reducing the noise pollution… in order to reduce power and fuel consumptions and limit CO2 and NOx emissions.

References

References is not available for this document.