摘要
以降低叶轮进口冲击混合损失为目标,对进口边为径向和轴向两种情况下的叶轮进口条件进行了优化,得到了相应的进口直径计算公式。基于流体力学理论,充分利用水泵进出口速度分布等宏观物理参量描述流体在叶轮流道内的流动,借助速度三角形分析计算离心泵内的各种损失,很好地揭示了几何参数对水泵性能的影响趋势,对水泵进行了综合性能预测。基于损失计算的水泵性能综合预测及分析方法可预测设计工况和非设计工况下的水泵性能,它集性能分析与设计于一体,为水泵新产品设计和现有产品改进提供了切实有效的工程实用方法。
A method to obtain the optimal inlet diameter of centrifugal pumps,aimed at reducing the inlet incidence losses was presented,with regard to both radial and axial leading edges.Individual losses in centrifugal pumps were analyzed and calculated,based on basic fluid mechanics fundamentals and fully utilizing velocity triangles at pump inlet and outlet to describe flow conditions through the pump.The effect of individual parameters on pump is difficult to predict simply from empirical rules, but the method presented here can quickly show the trend of their effect.So it can predict performance of pumps under designed modes,and that under off design modes.It integrates performance predic- tion and design and offers an effective,robust and practical approach to design new pump products and to improve existing ones.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2006年第S2期13-16,共4页
China Mechanical Engineering
基金
上海市教育委员会基金项目(04EB04)
上海市教育委员曙光计划项目(99SG26)
关键词
水泵
冲击损失
速度三角形
性能预测
pump
incidence loss
velocity triangle
performance prediction
