Similarity of Flow in Pump Sump

泵池内流量的相似性

• 批准号: 22560158
• 负责人: MATSUI Jun
• 金额: $ 3万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22560158/
• 关键词: 流体機械; 吸込水槽; 相似則; 吸込渦; フルード数; レイノルズ数; 水中渦; 吸込過

To study the similarity law in the flow of pump sump, especially on the critical submergence for both air entraining vortex and submerged vortex, three model pump sumps are constructed with geometrical similarity. Changing the flow rate and water height, the condition when sump vortex occurs is studied in each model. On the air entraining vortex, there are two critical lines of submergence, one is in proportional to the flow rate or velocity at bell inlet, the other is almost independent from flow rate. The former may be the effect of Froude number, but the later is not clear. On the submerged vortex, the line is not clear in the smallest model. Comparing the coefficients of above lines, the kinetic similarity is got at the same velocity condition, not Froude number similarity or Reynolds number similarity.

为了研究泵池流动的相似规律，特别是引气涡和浸没涡的临界浸没规律，构造了三个具有几何相似性的模型泵池。各模型研究了改变流量和水位高度时水池涡流发生的情况。在引气涡流上，有两条临界浸没线，一条与钟形入口处的流速或速度成正比，另一条几乎与流速无关。前者可能是弗劳德数的效应，但后者尚不清楚。在潜涡中，最小模型中的线并不清晰。比较以上几行的系数，得到的是相同速度条件下的动力学相似性，而不是弗劳德数相似性或雷诺数相似性。

项目成果

Experimental study on the similarity of flow in pump sump models

• DOI: 10.1088/1755-1315/15/6/062047
• 发表时间: 2012-11
• 期刊: IOP Conference Series: Earth and Environmental Science
• 作者: K. Kawakita;J. Matsui;H. Isoda