| 导叶安装位置对余热排出泵内流特性的影响 |
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| 引用本文： | 王文杰,袁寿其,裴吉.导叶安装位置对余热排出泵内流特性的影响[J].排灌机械工程学报,2014,32(9):759-764. |
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| 作者姓名： | 王文杰 袁寿其 裴吉 |
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| 作者单位： | 江苏大学国家水泵及系统工程技术研究中心, 江苏 镇江 212013 |
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| 摘 要： | 为研究导叶与蜗壳的最优相对安装位置,采用ANSYS CFX14.0对百万千瓦级核电用余热排出泵不同流量工况下定常流动进行全流道三维数值模拟,分析导叶与蜗壳5种不同相对位置对余热排出泵内部流动特性的影响规律,对比分析了泵内部压力、速度及湍动能分布特性.结果表明:在设计流量和大流量工况下,导叶与蜗壳不同相对位置对扬程的影响较小;在小流量工况下,导叶与蜗壳的相对位置对叶轮内部压力分布影响较小,对导叶和蜗壳内流特性影响较大;当导叶与蜗壳相对位置θ=79.56°时,余热排出泵高效区最宽,导叶流道内沿流线方向压力梯度变化比较均匀,蜗壳流道内压力、速度梯度变化最小,蜗壳出口压力梯度变化均匀.该研究为导叶的最优相对安装位置提供了一定的参考.
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| 关 键 词： | 余热排出泵 流动特性 导叶 蜗壳 相对位置 |
| 收稿时间： | 2013-11-06 |
Effects of relative setting position between diffuser and volute on flow characteristics of residual heat removal pump |
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| Wang Wenjie,Yuan Shouqi,Pei Ji.Effects of relative setting position between diffuser and volute on flow characteristics of residual heat removal pump[J].Journal of Drainage and Irrigation Machinery Engineering,2014,32(9):759-764. |
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| Authors: | Wang Wenjie Yuan Shouqi Pei Ji |
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| Institution: | National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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| Abstract: | In order to investigate the best relative setting position between the diffuser and volute, the three-dimensional, steady turbulent flows in a residual heat removal pump(RHRP)are simulated at five relative positions by using ANSYS CFX14.0. The pressure, velocity and turbulent kinetic energy distributions in the RHRP are achieved and analysed comparatively. The results show that the relative position influences the pump head slightly under design and over-load conditions. Under part-load condition, even though the relative position shows a less effect on the pressure distribution in the impeller, it impacts the flow characteristics in the diffuser and volute obviously. As the relative position is θ=79.56°, there is the widest range of high efficiency for the pump, and there is a uniform pressure gradient in the diffuser and the discharge nozzle of the volute. Besides, the variation of the pressure and velocity gradients is minimal in the volute. The results can provide a reference for selecting the best relative position between diffuser and volute. |
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| Keywords: | residual heat removal pump flow characteristics diffuser volute relative positions |
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