Research on underwater flat plate wall shear stress measurement with MEMS sensors array

Tian Yukui; Zhang Xuan; Shen Xue; Sun Hailang; Xie Hua; Zhang Nan

doi:10.11729/syltlx20170031

Volume 31 Issue 3

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Tian Yukui, Zhang Xuan, Shen Xue, et al. Research on underwater flat plate wall shear stress measurement with MEMS sensors array[J]. Journal of Experiments in Fluid Mechanics, 2017, 31(3): 82-87. doi: 10.11729/syltlx20170031

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Research on underwater flat plate wall shear stress measurement with MEMS sensors array

doi: 10.11729/syltlx20170031

China Ship Scientific Research Center, National Key Laboratory of Science and Technology on Hydrodynamics, Wuxi Jiangsu 214082, China

Received Date: 2017-01-16
Rev Recd Date: 2017-05-19
Publish Date: 2017-06-25

Abstract

Abstract

Aiming at underwater wall shear stress measurement, researches have been conducted which include MEMS wall shear stress sensors calibration, flat plate model design, weak signal detection system development, flat plate boundary parameter estimation and CFD analysis, and near-wall LDV boundary layer profile measurement. The local free stream velocities ranging from 0.2m/s to 0.7m/s are adopted for the underwater flat plate test in a precision water flume. And the wall shear stress is directly measured by MEMS sensors array. Also the boundary layer profiles of the investigated area upon the plate surface are detected with LDV and mean wall shear stress values are extrapolated. The results from the MEMS sensors match well with those from the LDV velocity profile fittings and are in good agreement with empirical estimations with an overall bias less than 5%.
- MEMS,
- LDV,
- boundary layer,
- underwater flat plate,
- wall shear stress

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References(20)

References

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