文献类型：期刊文献

中文题名：泵腔和口环对微型超低比转速离心泵模拟误差的影响

英文题名：Effects of Pump Chamber and Wear Ring on Simulation Error of Miniature Super-low Specific Speed Centrifugal Pump

作者：周进[1];邢改兰[1];周邵萍[1]

机构：[1]华东理工大学承压系统与安全教育部重点实验室

年份：2020

卷号：46

期号：1

起止页码：135

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

语种：中文

中文关键词：泵腔;口环;离心泵;数值模拟;超低比转速

外文关键词：pump chamber;wear ring;centrifugal pump;numerical simulation;super-low specific speed

摘要：为研究泵腔和口环对微型超低比转速离心泵模拟误差的影响,采用Fluent软件对全流场模型和非全流场模型分别进行数值模拟,在对比实验结果的基础上分析误差原因。结果表明:全流场模型的模拟误差比非全流场模型低11.6%;全流场模型能够预测扬程曲线的“驼峰”现象、叶轮出口的“射流-尾流”现象和蜗壳内部的非对称流动;非全流场模型无法模拟圆盘摩擦损失,导致较大的功率和效率模拟误差;非全流场模型无法模拟口环泄漏,使得叶轮的流量的模拟值低于实际值,导致较大的内流分布模拟误差。
The cost of numerical simulation can be reduced by properly simplifying the physical model of the pumps,but unreasonable simplification may lead to large simulation error.In order to study the effects of pump chamber and wear ring on the simulation error of a miniature super-low specific speed centrifugal pump,numerical simulation had been carried out by Fluent based on the whole flow field model and non-whole flow field model.To verify the accuracy of numerical simulation,the external characteristic experiment had also been carried out on a miniature pump special test rig.The reasons that lead to the simulation error were analyzed by comparing the simulation results with the experiment results.It is observed that the simulation error of the whole flow field model is 11.6%lower than that of the non-whole flow field model.The whole flow field model can simulate the hump phenomenon of head curve,the jet-wake phenomenon at impeller outlet and the asymmetric flow field distribution in volute.The non-whole flow field model cannot simulate the disk friction loss in pump chamber,which leads to a large error in power and efficiency simulation.The non-whole flow field model cannot simulate the leakage from wear ring,which makes the simulation value of the fluxes through impeller lower than the actual value,resulting in a large error in internal flow distribution simulation.