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原文传递 Calibrating the Loss Coefficient of a Porous Plate

题名：	Calibrating the Loss Coefficient of a Porous Plate
其他题名：	American Petroleum Institute.(2000)."Recommended practice for planning,designing,and constructing fixed offshore platforms—Working stress design."API RP2A-WSD,Washington,DC.
正文语种：	英文
作者：	Patrick F. Cummins
关键词：	representation；structure；framework；upstream；geometric；fraction；relation；loading；late；unbound
摘要：	Marine structures are sometimes represented in coastal ocean circulation models as a porous plate that exerts drag on the flow and dissipates energy. Such a representation requires that a loss coefficient be specified to reduce the flow speed to some prescribed fraction of the upstream incident flow. To provide guidance and a framework for this problem, the case of a uniform channel that is partially blocked by a porous structure is considered. Drawing on existing results fromactuator disc theory, simple analytical relations are presented for the dependence of the flow speed through a porous plate on the loss coefficient. It is shown that limitations on representing structures with high hydrodynamic loading using an actuator disc in an unbounded region can be avoided by allowing for weak geometrical blockage by lateral boundaries.
出版年：	2017
论文唯一标识：	P-108Y2017V143N02008
英文栏目名称：	TECHNICAL NOTES
doi：	10.1061/(ASCE)WW.1943-5460.0000364
期刊名称：	Journal of Waterway, Port, Coastal, and Ocean Engineering
拼音刊名(出版物代码)：	P-108
卷：	143
期：	02
页码：	86-90