Accurate Measurements of Wall Shear Stress on a Plate with Elliptic Leading Edge

Accurate Measurements of Wall Shear Stress on a Plate with Elliptic Leading Edge

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A micro-floating element wall shear Skin Care Tools stress sensor with backside connections has been developed for accurate measurements of wall shear stress under the turbulent boundary layer.The micro-sensor was designed and fabricated on a 10.16 cm SOI (Silicon on Insulator) wafer by MEMS (Micro-Electro-Mechanical System) processing technology.Then, it was calibrated by a wind tunnel setup over a range of 0 Pa to 65 Pa.

The measurements of wall shear stress on a smooth plate were carried out in a 0.6 m × 0.6 m transonic wind tunnel.Flow speed ranges Engraved Mama Bear Necklace Gift Box from 0.

4 Ma to 0.8 Ma, with a corresponding Reynold number of 1.05 × 106~1.55 × 106 at the micro-sensor location.

Wall shear stress measured by the micro-sensor has a range of about 34 Pa to 93 Pa, which is consistent with theoretical values.For comparisons, a Preston tube was also used to measure wall shear stress at the same time.The results show that wall shear stress obtained by three methods (the micro-sensor, a Preston tube, and theoretical results) are well agreed with each other.