块体形状对水流拖曳力的影响  

Effect of square-section cylinder shape on the drag force

作　　者：庞启秀[1] 徐金环[2] 辛海霞[3] 

机构地区：[1]交通部天津水运工程科学研究所,天津300456 [2]河海大学交通学院,南京210098 [3]天津航道局,天津300450

出　　处：《水道港口》2006年第1期5-8,22,共5页Journal of Waterway and Harbor

基　　金：江苏省重点学科建设基金(4021B3)

摘　　要：在计算块体受到的水流拖曳力时,常借鉴针对球体所提出的公式,然而它并不能客观地反映出块体形状对拖曳力产生的影响。文中将块体形状概化为长方体,通过水槽试验测量了水流作用下不同尺度的大颗粒块体受到的水平拖曳力,研究了块体形状对水流拖曳力的影响,并提出了考虑块体形状影响的拖曳力计算公式。When calculating the drag force on the square- section cylinder, the formula for sphere is usually applied. However the effect of the shape on the hydrodynamic force cannot be reflected well. In the paper, the drag forces acting on the square-section cylinders are surveyed in the variable slope flume, and attention is paid to the effect of cylinder shape on the drag force. The variety relation between the drag and the cylinder shape is studied, and then the formula for the drag force calculation is presented, considering the effect of shape.

关 键 词：水平拖曳力 块体形状 水槽试验 

分 类 号：TV131[水利工程—水力学及河流动力学]