| 摘要: |
| 为验证轴流泵装置封闭式进水池防涡消涡措施的有效性，应用ANSYS 14.5对泵装置进行全流场CFD数值模拟研究。针对封闭式进水池内产生的附壁涡、附底涡，提出对称蜗壳形后壁与导流锥的新型组合措施。基于湍流模型和模型试验进行了涡带对比，分析了涡带的分布和成因，优化了封闭式进水池几何参数。针对附壁涡问题，采用单因素控制变量法进行后壁防涡消涡研究，发现对称蜗壳形后壁在效率和流速均匀度方面具有更突出效果。针对附底涡问题，采用导流锥作为预防措施，并优化了导流锥的最佳锥体高径比，相应的研究成果已应用于镇江龟山闸泵站工程。 |
| 关键词: 数值模拟；模型试验；泵装置效率；流速均匀度；涡带防治 |
| DOI： |
| 分类号:TV68 |
| 基金项目:国家自然科学基金(51779214) |
|
| A study on eddy-prevention based on a new combination of symmetric cochlear shell type and diversion cone |
|
wangyajun
|
|
华东院
|
| Abstract: |
| In order to verify the effectiveness of the axial pump station, the full-field CFD numerical simulation was studied, focused on the wall vortex formed behind the closed sump and the bottom velocity singularity area at the bottom of the horn.A new combination of symmetric cochlear shell type and diversion cone were proposed and optimized. Numerical simulation results show that symmetric cochlear shell type improves the efficiency and velocity uniformity and the diversion cone can effectively occupy the water flow singularity area and guide the water flow into the horn mouth. The reasonable sized diversion cone has little influence on the pumping efficiency.Diversion cone height ratio 0.4 was suggested. The symmetric cochlear shell type and diversion cone has been applied to Zhenjiang Guishan Gate Pumping Station Project, with good eddy-prevention function. |
| Key words: Numerical simulation; Model test; Pumping efficiency; Velocity uniformity; Eddy-prevention |
