桥墩群体绕流的复变函数理论解  

Theoretical solution of complex function about flow around bridge piers

作　　者：张兰丁[1] 

机构地区：[1]南京水利科学研究院水工水力学研究所,江苏南京210029

出　　处：《水利水电科技进展》2005年第1期14-16,共3页Advances in Science and Technology of Water Resources

基　　金：国家高速水力学重点实验室开放基金资助项目(0202)

摘　　要：桥墩群体绕流的复变函数理论解给出了在平面无旋流动条件下,多个桥墩绕流的理论解,从而将经典流体力学的桥墩绕流的理论解由单个推广到了多个.采用该理论解,通过试算得出了桥墩横断面的理论曲线,可根据预定的墩间流速进行多个桥墩绕流时的横断面设计,合理地确定桥墩间距,并可给出墩间二维流场理论解.按势流处理,水流流过该理论解给出的桥墩横断面时是无分离的,虽与实际情形有所出入,但具有理论基础,因此可供桥梁工程规划、设计参考引用.The theoretical solution of flow around several bridge piers was given under the plane irrotational flow condition. Hence the solution of flow around single pier in classical fluid mechanics was developed to that around several piers. With the theoretical solution, it is convenient to obtain the theoretical curve for the cross section of bridge piers, and further to design the cross section and reasonably determine the distance between piers with flow around several bridge piers. Moreover, the theoretical solution of 2-D flow field around piers can also be given. According to the theoretical solution, there is no separation in the flow field around piers under potential flow condition, which is of a little difference with the reality. However the solution can still be applied to planning and design in bridge projects because of its theoretical basis.

关 键 词：桥墩群体 绕流 势流 复变函数 理论解 

分 类 号：TV131.3[水利工程—水力学及河流动力学] U442.3[建筑科学—桥梁与隧道工程]