A MEMS skin-friction sensor for time resolved measurements in separated flows
| Autor: | Ernst Obermeier, S. Pirskawetz, H. H. Fernholz, M. Schober |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Fluid Flow and Transfer Processes
Microelectromechanical systems Materials science business.industry Resolution (electron density) Flow (psychology) Computational Mechanics General Physics and Astronomy Transfer function Flow separation Optics Mechanics of Materials Parasitic drag Temporal resolution Calibration business |
| Zdroj: | Experiments in Fluids. 36:593-599 |
| ISSN: | 1432-1114 0723-4864 |
| DOI: | 10.1007/s00348-003-0728-4 |
| Popis: | A MEMS surface fence sensor for skin-friction measurements in separated flows has been developed and tested successfully in low-speed flows. The new sensor is able to distinguish between forward and reverse flow and features a temporal resolution of up to 1 kHz. Calibrations of the sensor have been obtained in the range of –0.7 N m-2≤τ w≤0.7 N m-2 with a resolution of 0.02 N m-2. Comparative measurements with the wall-pulsed wire technique in a reverse-flow region show excellent agreement with respect to the mean skin-friction coefficient c f but also reveal some discrepancies for the fluctuating part c f′. |
| Databáze: | OpenAIRE |
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