排灌机械工程学报Issue(1)：26-31,6.DOI:10.3969/j.issn.1674-8530.14.0211
多级离心泵内部非定常压力脉动的数值模拟
Numerical simulation of unsteady pressure pulsation in multistage centrifugal pump
摘要
Abstract
In order to study steady and transient characteristics of fluid flow in centrifugal multistage pumps,the unsteady flow field in two stages of a multistage centrifugal pump made of stainless steel was simulated under design flow condition by making use of ANSYS CFX and the standard k -εturbu-lence model.The performance curves predicted are in good agreement with the experimental data,va-lidating the accuracy of the flow models and numerical methods.Additionally,four monitoring points are specified on the pressure and suction sides in a flow passage of the impeller,respectively;mean-while other six monitoring points are positioned in various locations in a flow passage of the diffuser and guide vane.The pressure pulsation characteristics are analysed in time and frequency domains at these points.The results show that the rotor-stator interaction between impeller and guide vane is the cause for the static pressure fluctuation,and the average fluctuation of static pressure increases gradually from the inlet to the outlet of impeller.The shape of integrally formed stamping impeller can affect the pres-sure pulsation in the diffuser,and the pressure pulsation in one period is similar in another.The influ-ence of rotor-stator interaction is dominated in the first guide vane;as a result,the pressure fluctuation is in 3 times blade passing frequency in the middle and at the outlet of guide vane,but is in 1 time blade passing frequency only at the other locations.The pressure pulsation in the diffuser is in a fre-quency as low as blade passing frequency.关键词
多级离心泵/非定常流动/压力脉动/动静干涉/不锈钢冲压叶轮Key words
multistage centrifugal pump/unsteady flow/pressure pulsation/rotor-stator interaction/stainless steel stamping impeller分类
农业科技引用本文复制引用
马新华,冯琦,蒋小平,王伟,何勇冠..多级离心泵内部非定常压力脉动的数值模拟[J].排灌机械工程学报,2016,(1):26-31,6.基金项目
国家科技型中小企业创新基金资助项目（14C26213201080）；江苏省自然科学基金资助项目 （）
