An experimental study of wind force acting on commercial double-layered square metal screens at different spacing

Abstract

In this study, an experimental setup was established to measure the pressure drop of flow through single- and double-layer woven metal screens. Three woven metal screens with different porosities of the plain-square type were tested in this study. The Reynolds number based on the screen wire diameter ranged from Re =111 to Re=2890 and the range of porosity was 0.34 to 0.67. Based on the measured drag coefficient of the three single- and double-layer plain woven metal screens, this study indicates the drag coefficient of low porosity double-layer screen is less than twice of that of the single-layer screen if the spacing of two layers remains less than 14 times of the screen wire diameter.