消能锥形阀过流状态研究与优化

发布时间：2018-04-19 23:41

本文选题：锥形阀 + 试验　；参考：《南水北调与水利科技》2017年01期

【摘要】：消能锥形阀是一种用于中、高水头下的消能控流阀门,其内部结构设计的好坏直接影响着控流效果。为探究消能锥形阀在不同开度下,过流流量及内部流场的变化情况。进行了模型试验与CFD数值模拟计算,试验中发现开度从100%关至85%时出现了流量反而上升、进口压力下降的情况。利用CFD数值模拟的方法对内部流场进行了可视化研究。研究结果表明,在全开状态下锥形阀内部存在以下问题:过强的局部高速高压区域、低速流动死区范围过大、涡流区过度影响高速过流部分。并对锥形阀进行了一定的结构改进,优化了其内部流场情况。
[Abstract]:The energy dissipation conical valve is a kind of energy dissipation and flow control valve used in middle and high water head, and its internal structure design directly affects the flow control effect. In order to investigate the change of flow rate and internal flow field of cone valve with different opening. The model test and CFD numerical simulation were carried out. It was found that the flow rate increased and the inlet pressure decreased from 100% to 85%. The visualization of internal flow field is studied by CFD numerical simulation. The results show that the following problems exist in the conical valve under full open condition: the local high speed and high pressure region is too strong, the dead zone range of low speed flow is too large, and the eddy current zone is too much to influence the high speed over flow part. The conical valve was improved to optimize the internal flow field.
【作者单位】：长沙理工大学能源与动力工程学院;长沙佳能通用泵业有限公司;湖南省特大口径阀门工程技术研究中心;
【分类号】：TV134

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