T.K. Storgaard-Larsen, P. Buchhave

In this paper we propose an ultra-small and ultrasensitive fiber-optic pressure sensor which can be flush mounted in a wall. A brief review of the importance of having small sensors when measuring laminar/turbulent transition is given. The theory of the sensor, which is based on optical interferometric measurement of a small pre-stressed silicon membrane (appr.1.4mm square, 0.2µm thick), is explained. The so-called micromachining technique applied for etching membranes in silicon wafers is shortly described and four sizes of pre-stressed silicon membranes are characterized. Sensitivity, signal-to-noise ratio and frequency response are investigated both theoretically, and experimentally by testing two sensor heads against a Brilel and Kjær Type 4182 probe microphone.

First European Forum on Laminar Flow Technology, Hamburg, 1992

Conference Paper

englisch

21,0 x 29,7 cm, 7 Seiten

DGLR-Bericht, 1992, 1992-06, First European Forum on Laminar Flow Technology; S.244-250; 1992; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

aerodynamics, boundary layer transition, laminar flow

Bestellbar

1992