本文關鍵詞： 渦流 水利設備 進口高度 瞬態(tài)數(shù)值模擬 截流特性 內(nèi)部流動特性 試驗驗證　出處：《農(nóng)業(yè)工程學報》2017年22期 　論文類型：期刊論文

【摘要】：為研究不同進口高度h的渦流截流裝置的截流特性,選用瞬態(tài)不可壓縮流動的N-S方程和重整化群RNG k-ε湍流模型,采用歐拉模型中的VOF(volume of fluid)法對渦流截流裝置進行了數(shù)值模擬,分析了進口高度h對渦流截流裝置截流特性、截流效率的影響,并且研究了渦流裝置內(nèi)部流場分布特性,同時對渦流截流裝置的截流特性進行了試驗驗證。結(jié)果表明,進口高度越小,截流能力越強;渦流截流裝置的截流效率,隨著高度h增大先減小后增大,轉(zhuǎn)折點在3h/5~4h/5之間;當進口寬度固定時,為了保證不發(fā)生溢流或者堵塞,且能夠?qū)崿F(xiàn)較好截流,渦流截流裝置的進口高度應選擇4h/5~5h/5之間,此時,渦流裝置的進口截面面積大于出口截面面積。渦流截流裝置的截流主要是因為在裝置內(nèi)部形成了局部低壓,靜壓力轉(zhuǎn)換為流體運動的動壓力,使流體產(chǎn)生高速旋流,發(fā)生了旋流截流。該研究可為城市污水截流裝置提供新的可選設計方法,降低污水溢流或者內(nèi)澇發(fā)生率。
[Abstract]:In order to study the closure characteristics of eddy current interceptor with different inlet height h, the N-S equation of transient incompressible flow and the RNG k- 蔚 turbulence model of renormalization group were selected. The VOF(volume of fluidmethod in the Euler model is used to simulate the eddy current interceptor, and the characteristics of the inlet height h are analyzed. The effect of the closure efficiency on the flow field distribution in the eddy current device is also studied. The experimental results show that the smaller the inlet height, the stronger the closure capacity. With the increase of height h, the closure efficiency of eddy current interceptor first decreases and then increases, and the turning point is between 3 h / 5 h and 4 h / 5; When the inlet width is fixed, in order to ensure that there is no overflow or blockage, and to achieve better closure, the inlet height of the vortex closure device should be between 4 h / 5 h / 5 and 5 h / 5. The inlet cross section area of the eddy current device is larger than the exit section area. The main reason for the vortex closure device is that the local low pressure is formed inside the device and the static pressure is converted to the dynamic pressure of the fluid movement. This study can provide a new alternative design method for urban sewage interceptor and reduce the incidence of sewage overflow or waterlogging.
【作者單位】： 水利部杭州機械設計研究所(水利部產(chǎn)品質(zhì)量標準研究所);水利機械及其再制造技術浙江省工程實驗室;
【基金】：浙江省公益技術應用研究項目(2017C33010) 水利部公益性行業(yè)科研專項經(jīng)費項目(201501026)
【分類號】：TV134
【正文快照】： 0引言隨著社會的進步,工業(yè)企業(yè)排放的污染性氣體、汽車尾氣等會形成大氣干沉降,累積在地表上,沉積在管道中,隨著降雨,這些污染物會隨著雨水的沖刷進入水體對水質(zhì)產(chǎn)生污染[1-3],使得城市雨水管道污染問題變得更加嚴重。因此,如何控制城市強降雨雨水污染問題及加大雨水利用率已，

本文編號：1475457