不同隙宽条件下L形裂隙水头损失试验  

Experimental study on water head loss of L-shaped fractures with different aperture widths

作　　者：束龙仓[1] 张春艳[1] 闵星[1] 柯婷婷[1] 唐然[1] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2013年第5期383-388,共6页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金(41172203)

摘　　要：根据室内模拟试验,研究了水流流经L形裂隙时水头损失随裂隙宽度、裂隙中水流流速变化的规律。研究结果表明:水流流经L形裂隙的水头损失随隙宽的增大而增大,与水流流速之间呈二次函数关系;综合分析不同隙宽条件下L形裂隙水头损失与流速之间的二次函数关系,显示此函数关系的二次项系数与隙宽之间呈线性关系,一次项系数与隙宽之间呈二次方关系,最终得到L形裂隙水头损失与隙宽及流速之间的经验公式。Laboratory simulation was conducted to study the water flow in L-shaped fractures with different aperture widths and flow velocities. The results show that the water head loss of L-shaped fractures increased with the increase of the aperture width, and the water head loss can be approximated by a quadratic function of the flow velocity. There was a linear relationship between the quadratic coefficient and the aperture width and a quadratic relationship between the monomial coefficient and the aperture width. Finally, an empirical function of the water head loss, the flow velocity, and the aperture width was obtained.

关 键 词：L形裂隙 裂隙宽度 水头损失 流速 室内模拟试验 

分 类 号：TV139.1[水利工程—水力学及河流动力学]