基于CFD的泵站进水流道优化  

CFD Optimization Study of Intake Channel of Pumping Station

作　　者：田尧天 江全星 彭昆 万川 罗莎 陈慧 符向前[3] TIAN Yaotian;JIANG Quanxing;PENG Kun;WAN Chuan;LUO Sha;CHEN Hui;FU Xiangqian(School of Energy and Power Engineering,Xihua University,Chengdu Sichuan 610039,China;Wuhan Ruishan Zhishui Science and Technology Research Co.,Ltd.,Wuhan Hubei 430072,China;School of Power and Mechanical Engineering,Wuhan University,Wuhan Hubei 430072,China)

机构地区：[1]西华大学能源与动力工程学院,四川成都610039 [2]武汉睿山智水科学技术研究有限责任公司,湖北武汉430072 [3]武汉大学动力与机械学院,湖北武汉430072

出　　处：《农业工程》2024年第6期92-99,共8页AGRICULTURAL ENGINEERING

基　　金：湖北省重点研发计划项目(2023BBB085)。

摘　　要：受限于用地规模、地形等因素,我国排水泵站流道的设计趋于复杂,普遍具有流道深、狭长的特点。这导致泵站进水流道存在回流、流速分布不均匀等不良流态,影响泵站安全稳定运行。以某泵站为实例,采用计算流体力学(computational fluid dynamics,CFD)技术,通过改变肘形流道的弯曲段长度、底边线倾角和喉管高度,拟定优化设计方案,采用基于CFD的数值模拟方法分析流道内部流场分布,并根据流道出口的流速分布均匀度、速度加权平均角度和流道水力损失等水力指标比选,优选出最优方案。该研究为进水流道设计提供了更精细的优化手段,弥补了传统经验设计方法只能定性分析的不足,得到的最优设计方案可供类似工程参考,保障泵站机组的稳定运行。Limited by size of urban land,topography,and other factors,design of urban pumping station flow channels in China tends to be complex,generally with features of deep,narrow,and long flow channels.This leads to existence of backflow,uneven flow velocity distribution,and other undesirable flow patterns in inlet channels of pumping stations,affecting safe and stable operation of pumping stations.Computational fluid dynamics(CFD)technology was used to optimize design scheme by changing length of bending section,inclination angle of bottom edge,and throat height of elbow-shaped flow channel.Flow field distribution inside flow channel was analyzed by CFD-based numerical simulation,and optimal solution was selected based on uniformity of flow velocity distribution,velocity-weighted average angle,and hydraulic loss of flow channel.A more refined optimization method for design of inlet flow channel was provided,which could make up for shortage of traditional empirical design method that could only be analyzed qualitatively.This optimal design solution could be used as a reference for similar projects to ensure stable operation of pumping station unit.

关 键 词：泵站 流道设计 流态优化 数值模拟 计算流体力学 

分 类 号：S277[农业科学—农业水土工程]