详情

原文传递 Porous Plate Method: Reduction in Local Scour around Pier-Type Structures in Multidirectional Flows

题名：	Porous Plate Method: Reduction in Local Scour around Pier-Type Structures in Multidirectional Flows
正文语种：	eng
作者：	Masanori Nakai;Takayuki Nakabayashi;Norihiro Nishimura;Kakeru Watanabe;Hiroharu Yatabe
作者单位：	Division of Architectural Civil and Environmental Engineering Tokyo Denki Univ. Hatoyama Hiki Saitama 350-0394 Japan;Tokyo Kyuei Co. Ltd. 6906-10 Shiba Kawaguchi Saitama 333-0866 Japan;Tokyo Kyuei Co. Ltd. 6906-10 Shiba Kawaguchi Saitama 333-0866 Japan;Division of Architectural Civil and Environmental Engineering Tokyo Denki Univ. Hatoyama Hiki Saitama 350-0394 Japan;Division of Architectural Civil and Environmental Engineering Tokyo Denki Univ. Hatoyama Hiki Saitama 350-0394 Japan
关键词：	Porous plate; Horseshoe vortex; Pier-type structure; Multidirectional flow; Local scour
摘要：	To reduce the local scour around pier-type structures, a "porous plate method" was proposed, aiming at effectiveness in multidirectional horizontal flows. The porous plates installed on the pier surface near the bed play two important roles in the reduction of the local scour. One is "breaking down or weakening" of the horseshoe vortex by a decline in vorticity. In the neighborhood (just upstream region), the local scour depth greatly decreases due to suppression of picking up sediment grains from the bed. Another is the resultant "flow regulation" in the boundary layer on the pier surface. In the downstream side, the wake separated from the pier surface behaves as "semi-homogeneous turbulence" without a Karman vortex street, then the scour area drastically decreases.
出版年：	2023
期刊名称：	Journal of Waterway, Port, Coastal and Ocean Engineering
卷：	149
期：	2
页码：	06023001.1-06023001.5