离心式上充泵空化特性分析

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (15) : 82-87.

论文

离心式上充泵空化特性分析

付强，袁寿其，蒋旭松，朱荣生，王秀礼，龙云

作者信息 +

Cavitation characteristics analysis of a centrifugal charging pump

FU Qiang，YUAN Shou-qi， JIANG Xu-song，ZHU Rong-sheng，WANG Xiu-li，Long Yun

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文章历史 +

摘要

为研究核电站离心式上充泵的空化特性，专门研制了首级样机。应用PRO/E和ICEM分别对水力部件进行三维造型和网格划分。将空化细分成空化初生，空化发展，临界空化和断裂空化四个阶段。基于SST k-ω 湍流模型，采用ANSYS CFX进行了空化数值模拟。结果表明：伴随着空化的发生，叶轮内沿径向位置的汽泡数量迅速增加，汽泡体积分数也越来越大。叶轮内逐渐出现漩涡，漩涡导致泵扬程在断裂空化状态下快速下降。（修改后：空化发生到一定程度时，叶轮内出现漩涡并且面积不断增加。）空化初生时的压力脉动较为规律，叶轮与蜗壳动静干涉起主要作用；随后空化逐渐成为控制泵内部压力脉动规律的主要因素。最大流量工况点模拟值与试验值的扬程误差为2.1%，汽蚀余量误差为3.5%。数值计算结果与试验结果的变化趋势相同，揭示了上充泵在不同空化状态下的内部流场变化规律。

Abstract

In order to study cavitation characteristics of a centrifugal charging pump in nuclear power plant，the first prototype was specially made. Pro/E and ICEM software were respectively used to be the tools of three-dimensional modeling and meshing of the hydraulic machinery. The cavitation was divided into four stages: cavitation inception，cavitation development，critical cavitation and fracture cavitation. Based on SST k-ω turbulence model，cavitation numerical simulation was finished by ANSYS CFX software. The results showed that: with the occurrence of cavitation，number of bubbles in the radial position in the impeller increases rapidly，and bubble volume fraction is also growing. Vortex appears gradually in the impeller and it leads to sharp decline in pump head in fracture cavitation. （修改后：When cavitation occurs to a certain extent, vortex appears in the impeller and its area constantly increases.）Pressure pulsation is regular in cavitation inception and dynamic and static interference of the impeller and the volute plays a main role；then cavitation gradually becomes the main factor of controlling pump pressure fluctuation rules. In the maximum flow rate condition，head error of simulation and experimental results is 2.1% and NPSH error is 3.5%. The change trend of numerical results and test results are same and they reveal changes of internal flow field of the charging pump indifferent cavitation conditions.

导出引用

付强，袁寿其，蒋旭松，朱荣生，王秀礼，龙云. 离心式上充泵空化特性分析[J]. 振动与冲击, 2015, 34(15): 82-87

FU Qiang，YUAN Shou-qi， JIANG Xu-song，ZHU Rong-sheng，WANG Xiu-li，Long Yun. Cavitation characteristics analysis of a centrifugal charging pump[J]. Journal of Vibration and Shock, 2015, 34(15): 82-87

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