Institute of Aerodynamics, RWTH Aachen University, Wüllnerstraße 5a, 52062 Aachen, Germany.
Sensors (Basel). 2009;9(4):2222-51. doi: 10.3390/s90402222. Epub 2009 Mar 30.
Wall-shear stress results from the relative motion of a fluid over a body surface as a consequence of the no-slip condition of the fluid in the vicinity of the wall. To determine the two-dimensional wall-shear stress distribution is of utter importance in theoretical and applied turbulence research. In this article, characteristics of the Micro-Pillar Shear-Stress Sensor MPS(3), which has been shown to offer the potential to measure the two-directional dynamic wall-shear stress distribution in turbulent flows, will be summarized. After a brief general description of the sensor concept, material characteristics, possible sensor-structure related error sources, various sensitivity and distinct sensor performance aspects will be addressed. Especially, pressure-sensitivity related aspects will be discussed. This discussion will serve as 'design rules' for possible new fields of applications of the sensor technology.
壁面切应力是由于流体在壁面附近的无滑移条件下相对于物体表面的相对运动而产生的。确定二维壁面切应力分布对于理论和应用湍流研究至关重要。本文总结了已显示出具有测量湍流中双向动态壁面切应力分布潜力的微柱剪切应力传感器 MPS(3)的特性。在简要介绍传感器的概念、材料特性、可能与传感器结构相关的误差源以及各种灵敏度和独特的传感器性能方面之后，将讨论压力灵敏度相关方面。这将作为传感器技术可能的新应用领域的“设计规则”。
