不同进口高度排水管道用涡流装置截流特性模拟与试验  

Closure characteristics simulation and experiment of eddy current device with different imported height in drainage pipeline

作　　者：马光飞 方勇 吴燕明 程文韬 李桃 李超 

机构地区：[1]水利部杭州机械设计研究所(水利部产品质量标准研究所),杭州310024 [2]水利机械及其再制造技术浙江省工程实验室,杭州310024

出　　处：《农业工程学报》2017年第22期46-52,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：浙江省公益技术应用研究项目(2017C33010);水利部公益性行业科研专项经费项目(201501026)

摘　　要：为研究不同进口高度h的涡流截流装置的截流特性,选用瞬态不可压缩流动的N-S方程和重整化群RNG k-ε湍流模型,采用欧拉模型中的VOF(volume of fluid)法对涡流截流装置进行了数值模拟,分析了进口高度h对涡流截流装置截流特性、截流效率的影响,并且研究了涡流装置内部流场分布特性,同时对涡流截流装置的截流特性进行了试验验证。结果表明,进口高度越小,截流能力越强;涡流截流装置的截流效率,随着高度h增大先减小后增大,转折点在3h/5~4h/5之间;当进口宽度固定时,为了保证不发生溢流或者堵塞,且能够实现较好截流,涡流截流装置的进口高度应选择4h/5~5h/5之间,此时,涡流装置的进口截面面积大于出口截面面积。涡流截流装置的截流主要是因为在装置内部形成了局部低压,静压力转换为流体运动的动压力,使流体产生高速旋流,发生了旋流截流。该研究可为城市污水截流装置提供新的可选设计方法,降低污水溢流或者内涝发生率。In order to provide a new alternative design scheme for the interception treatment of urban sewerage, and reduce the effluent overflow in the catchment or the incidence of water logging in the pipe network, the closure characteristics of the eddy current closure device, the static pressure field distribution, the velocity field distribution and the velocity streamline distribution of the internal flow field at different inlet height are investigated. In this article, the transient N-S equations of incompressible flow, the renormalization group RNG k-ε turbulence model and the VOF （volume of fluid） method of Euler model are selected to carry out three-dimensional numerical simulation on the eddy closure device. Under the change of inlet height, the influences of the eddy current on the closure properties and closure efficiency of closure device are analyzed, as well as the internal flow characteristics of device. At the same time, the closure characteristics of the eddy current interception device have been experimentally verified. The experimental results are in good agreement with that of the numerical simulation. Based on the analysis of the riveting characteristics and the internal flow field characteristics of the eddy current device, the results show that under all the inlet height, the eddy current closure device produces the S-type turning and plays the role of closure. The smaller the inlet height, the stronger the intercepting capacity of the eddy current closure device; but the possibility of overflow and blockage is also bigger. At the different the inlet height, when the S-type turning occurs, the water level in the catchment is not the same, indicating that the cutoff characteristics of the eddy current closure device not only are related to the water level in the water collecting well, but also may be related to the water level inside the eddy current closure device. When the inlet height is small, the area of the inlet cross section of the eddy current closure device is smaller than th

关 键 词：涡流 水利设备 进口高度 瞬态数值模拟 截流特性 内部流动特性 试验验证 

分 类 号：TD744[矿业工程—矿井通风与安全] TU992[建筑科学—市政工程]