道路雨水口水力特性的数值分析  

Numerical analysis of hydraulic characteristics of rainwater inlet on road

作　　者：张珂[1] 侯精明 宁利中[1] 马红丽 张迪[1] 苏锋 ZHANG Ke;HOU Jing-ming;NING Li-zhong;MA Hong-li;ZHANG Di;SU Feng(State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi'an University of Technology,Xi’an 710048,China;Ordos Water Conservancy Survey and Design Institute,Ordos 017000,China;Northwest Engineering Corporation Limited,Xi’an 710065,China)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验室,西安710048 [2]鄂尔多斯市水利勘测设计院,鄂尔多斯017000 [3]中国电建西北勘测设计研究院有限公司,西安710065

出　　处：《水动力学研究与进展（A辑）》2020年第6期697-704,共8页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金项目(10872164);陕西省国际科技合作交流计划项目(2017KW-014);陕西水利科技项目(2017slkj-14);陕西省科技厅项目(2017JQ3043)。

摘　　要：为了充分了解道路排水过程,掌握雨水口水力特性,利用商业软件Ansis FLUENT6.3分别对39组不同来流条件下的道路排水过程及雨水口水力特性进行精细模拟。并系统分析雨水口流态、流线及速度等分布特征。结果表明:雨水口的水力特性在其淹没前后分别以自由堰流形式和淹没堰流形式下泄。基于数值模拟数据以及量纲分析法,构建雨水口下泄流量系数与篦前水流的弗劳德数之间的经验公式Cw=-0.2755Fr^4+1.0755Fr^3-1.4745Fr^2+0.7609Fr-0.0215,决定系数R2=0.88,两者具有较高的相关性。该研究精确计算了道路排水过程,并通过模拟探究道路雨水口在不同入流条件下的泄流规律,有助于深化认识雨水口泄流过程,对指导城市内涝管理具有重要意义。In order to fully understand the road drainage process and the hydraulic characteristics of the rainwater inlet, the commercial software Ansis FLUENT6.3 is used to simulate the road drainage process and the hydraulic characteristics of the rainwater inlet in thirty-nine groups under different inflow conditions. Systematically analyze the distribution characteristics of rainwater inlet flow pattern, streamline and velocity and so on. The results indicate that the discharge characteristics of the rainwater inlet show different pattern before and after the rainwater inlet was flooded. When the rainwater inlet is not flooded, the road rainwater drains the water in the form of weir flow, otherwise flooded weir occurs. Based on the numerical simulation data and dimensional analysis, the empirical formula between the flow coefficient of the rainwater inlet and the Froude number is suggested Cw = -0.2755 Fr^4 +1.0755 Fr^3 -1.4745 Fr^2 +0.7609 Fr -0.0215,R^2 =0.88 which has a high correlation coefficient. In the study the process of urban road drainage is accurately calculated, and the discharge characteristic of rainwater inlet on the road under different inflow conditions is simulated, which will help persons deepen the understanding of discharge process of the rainwater and be significant for guiding urban waterlogging management.

关 键 词：城市洪涝 雨水口 水力特性 数值模拟 

分 类 号：TU992[建筑科学—市政工程] U419.3[交通运输工程—道路与铁道工程]