Experimental Study of Pressure Drop through a Fibrous Debris Bed Generated on a Perforated Plate with Embedded Mesh Screen

摘要

In this study, pressure drop through fibrous beds generated on a perforated plate with embedded mesh at three different approaching velocities was investigated. As the approaching velocity increased, greater compression of the fibrous bed was observed. It resulted in a non-linear decrease of the average bed thickness. It was observed that higher flow rates affected the shape of the debris bed and increased the head loss due to compression. This phenomenon increased the head loss by approximately 10 percent of its original value and decreased the debris bed thickness by about 10 percent, which in turn affected other parameters of the debris bed such as volume, density and porosity. Also, for higher approaching velocity a non-linearly increasing pressure drop was observed, which can be explained by two possible reasons such as the inertial term in Eq. and the compression which have stronger effects at high Reynolds number. In further works, additional analyses will be conducted to study the debris penetration and to develop a head loss model to better explain the phenomena observed in the present study.