排灌机械工程学报Issue(1)：18-25,8.DOI:10.3969/j.issn.1674-8530.15.0034
塑料井泵新型轴向导叶设计及内部压力脉动特性
Design of new type diffuser of plastic well pump and pulsation characteristics of internal pressure
摘要
Abstract
A new type axial diffuser is devised and the unsteady,three-dimensional and turbulent flow field in a plastic well pump with this diffuser is simulated based on a CFD method to exploit the inter-nal pressure pulsation phenomenon in the diffuser.The pulsation characteristics of pressure at the first and second stage impeller outlets as well as inside the first and second stage diffuses are obtained under the duty flow rate conditions;meanwhile,the frequency fluctuation of pressure is analyzed by fast Fou-rier transform.Compared with a bowl diffuser,the hydraulic performance of the axial diffuser is slight-ly poorer,but much better than a radial diffuser.The maximum pressure pulsation occurs at the inter-face between the impeller and the axial diffuser,and the magnitude of the pulsation declines when the fluid passes the diffuser.From the inlet to the outlet,the amplitude of pressure pulsation in the axial diffuser is significantly reduced,indicating an excellent pressure recovery capability.In addition,the amplitude of pressure pulsation in the second stage diffuser is lower than that in the first stage.The dominant frequency at various monitoring points is equal to the blade passing frequency or is an integer multiple of the frequency.There are some differences in the frequency domain distribution from the first stage diffuser to the second stage one.关键词
塑料井泵/新型轴向导叶/导叶设计/压力脉动/数值模拟Key words
plastic well pump/new axial guide vane/guide vane design/pressure pulsation/numerical simulation分类
农业科技引用本文复制引用
徐媛晖,张启华,施卫东,陆伟刚,王川,周岭..塑料井泵新型轴向导叶设计及内部压力脉动特性[J].排灌机械工程学报,2016,(1):18-25,8.基金项目
国家自然科学基金资助项目（51309118，51279069）；江苏省自然科学基金资助项目（BK20130527）；现代农业装备与技术教育部重点实验室开放基金资助项目 （）
