摘要
基于试验测试和数值计算对轴流式循环泵的自流特性进行研究,获得了自流转速、自流损失和损失系数随自流流量的变化规律,初步揭示了自流工况下轴流式循环泵内的流动规律.研究表明:轴流式循环泵的自流转速与自流流量成线性递增关系,设计流量下自流转速约为设计转速的48.6%;自流损失与自流流量成指数递增关系,自流损失系数随自流流量的增加呈先快速下降后趋于稳定的变化趋势;导叶和叶轮内的自流损失分别占整泵自流损失的54.4%和36.5%,导叶工作面发生的大尺度流动分离现象是决定轴流式循环泵自流损失大小的主要因素.研究工作为轴流式循环泵自流转速的预测和自流特性的优化提供了有益的参考.
Based on the experimental and numerical methods,the characteristics of artesian flow in axial circulating pump have been studied.The relationships between artesian flow rate and automatic rotation speed,flow loss,flow loss coefficient in artesian condition were obtained respectively:land the flow pattern was revealed preliminarily.The results show that the automatic rotation speed tends to increase linearly as artesian flow rate rises.The automatic rotation speed at design flow rate is about 48.6% of design value.The flow loss tends to increase exponentially as artesian flow rate rises.The coefficient of flow loss decreases rapidly with the increase of artesian flow rate and then tends to be stable.The flow loss in impeller accounts for 36.5% of pump and the guide vane takes 54.4%.The large scale separation occurred above pressure surface of guide vane is the major factor to flow loss of axial circulating pump in artesian condition.The research achievements are helpful to provide some reference for prediction of automatic rotation speed and optimization of flow resistance in circulating pump.
作者
李忠
付立志
龚卫锋
顾海飞
江启峰
LI Zhong;FU Li-Zhi;GONG Wei-Feng;GU Hai-Fei;JIANG Qi-Feng(School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China;Jiangsu Shuangda Pump & Valve Group Company Limited,Taizhou 214537,China;Shanghai Marine Equipment Research Institute,Shanghai 200031,China;Key Laboratory of Fluid and Power Machinery,Ministry of Education,Xihua University,Chengdu 610039,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2018年第12期2677-2681,共5页
Journal of Engineering Thermophysics
基金
中国博士后科学基金资助项目(No.176911)
江苏省博士后科研资助计划项目(No.1701054B)
流体及动力机械教育部重点实验室(西华大学)开放课题资助(No.SZJJ2017-095)
江苏高校优秀学科建设工程资助项目
关键词
轴流式循环泵
自流特性
流动损失
流动分离
axial circulating pump
artesian flow characteristics
flow loss
flow separation
