欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
为研究离心泵发生汽蚀后出现流量．扬程曲线陡降的原因，基于ANSYSCFX软件应用标准k-ε揣流模型、均质多相模型和Rayleigh．Plesset方程，对比转速为59的离心泵在不同工况下其内部的汽蚀特性进行数值模拟，并与试验结果进行对比，结果表明：数值模拟结果与试验结果一致，绝对误差为0．02％。流场分析表明，流量．扬程曲线下降的原因不是由单纯传统意义上的汽蚀引起的，主要是由于流道内的空泡增多到一定程度后使液体发生边界层分离产生的漩涡损失而引起的，从漩涡初生时就开始对流量-扬程产生影响，当整个流道都充满漩涡时，就会出现汽蚀断裂工况，初步揭示了泵内部汽-液两相流场的分布规律。
英文摘要：
In order to research the flow-head curve plunge caused by the cavitation of centrifugal pump, the standard k-ε turbulence model, homogeneous multiphase model and Rayleigh-Plesset equation were applied to simulate the cavitation characteristics in a centrifugal pump with specific speed of 59 under different conditions based on ANSYS CFX software. The results show that the numerical simulation result has the same trend with experiment result, and absolute error is 0.02%. The analysis of flow field shows that： the steep fall of flow-head curve is not only caused by the traditional cativation, but also mainly caused by the Vortex loss. As the empty bubble in the passageway increases to some degree, the liquid boundary layer separation happened, then vortex appears and vortex losses. While the vortex appears originally, it has an impact on the flow-head curve. When the bubble becomes more and the whole passageway is full of vortex, cavitation fault condition happens. It reveals the vapor-liquid tow-phase flow distribution within the centrifugal pump.
同期刊论文项目
同项目期刊论文
Application of different strategies of partitioned fluid-structure interaction simulation for a sing
Investigation of unsteady flow-induced impeller oscillations of a single-blade pump under off-design
Numerical Prediction of Unsteady Pressure Field Within the Whole Flow Passage of a Radial Single-Bla
期刊信息
位置：