| 汪亚军,陈福新,徐丽,成立,陆晨,钱瑭.一种对称蜗壳形后壁与导流锥方案进水池防涡消涡研究[J].中国水利水电科学研究院学报,2024,22(3):324-331 |
| 一种对称蜗壳形后壁与导流锥方案进水池防涡消涡研究 |
| Study on eddy-prevention in pump station sump with a new combination of symmetric cochlear shell type and diversion cone |
| 投稿时间：2023-03-25 |
| DOI：10.13244/j.cnki.jiwhr.20230054 |
| 中文关键词: 数值模拟 模型试验 泵装置效率 流速均匀度 涡带防治 |
| 英文关键词:numerical simulation model test pump unit efficiency velocity uniformity eddy-prevention |
| 基金项目:国家自然科学基金项目(51779214) |
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| 中文摘要: |
| 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，提出并优化了对称蜗壳形后壁与导流锥的防涡消涡措施。采用k-ε湍流模型数值模拟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，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效果突出。针对附底涡，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。 |
| 英文摘要: |
| In order to verify the effectiveness of the axial pump station eddy-prevention，the full-field CFD numerical simulation was studied，focusing on the wall vortex formed behind the closed sump and the bottom velocity singularity area at the bottom of the horn mouth.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.In order to prevent the wall vortex，the single factor control variable method was used to study the eddy-prevention and elimination.It has been found that the symmetrical cochlear shell type wall has a more prominent effect on efficiency and velocity uniformity.To prevent the bottom-attached vortex，the diversion cone was adopted as a preventive measure and the ratio of height to diameter of the diversion cone is optimized.The corresponding research results have been applied to the Guishanzha pump station project in Zhenjiang，with good eddy-prevention function. |
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