SMALL SILICON-BASED PRESSURE TRANSDUCERS FOR MEASUREMENTS IN TURBULENT BOUNDARY-LAYERS

被引：10

作者：

LOFDAHL, L ^{[1
]}

KALVESTEN, E ^{[1
]}

STEMME, G ^{[1
]}

机构：

[1] ROYAL INST TECHNOL, INSTRUMENTAT LAB, S-10044 STOCKHOLM 70, SWEDEN

来源：

EXPERIMENTS IN FLUIDS | 1994年 / 17卷 / 1-2期

关键词：

D O I：

10.1007/BF02412800

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Small silicon based sensors for the measurement of wall-pressure in turbulent flows have been designed and fabricated using microelectronic technology. The sensor diaphragms have a side length of 100 and 300 mum, and polysilicon piezoresistive gauges were used for detection of the deflection. A two-dimensional flat plate boundary layer was employed to determine the performance of the pressure transducers, and comparisons with established data from the literature were made. A threshold value for the pressure fluctuations of about the double Kolmogorov length scale was estimated independently from the probability distribution as well as from the power spectra. In good agreement with theoretical predictions of Blake (1986), the slope of the power spectra was found to be omega-1 in the intermediate and omega-5 in the high frequency range.

引用

页码：24 / 31

页数：8

共 19 条

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ROSSI M, ACOUSTIC ELECTRO ACO, pCH5

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