两种叶型离心泵内固液两相流场的对比  

Comparative Study of Solid-Liquid Two-Phase Flow Field in Centrifugal Pump with Two Types of Vanes

作　　者：李国威[1] 冯新伟[2] 崔俊奎[1] 孙琦[1] 

机构地区：[1]辽宁工程技术大学机械工程学院,辽宁阜新123000 [2]沈阳农业大学高等职业技术学院,沈阳110122

出　　处：《南水北调与水利科技》2012年第2期116-119,共4页South-to-North Water Transfers and Water Science & Technology

基　　金："十一五"国家科技支撑计划项目"北方地区地热能梯级利用关键技术研究"(2006BAJ03A06)

摘　　要：为了研究分流短叶片离心泵内固液两相流场的运动规律,应用Fluent软件分别对分流短叶片离心泵和原型离心泵进行固液两相流场的数值模拟,在多重参考系坐标下,采用有限体积法对雷诺时均Navier-Stokes方程进行离散,选用标准的k-ε湍流模型和SIMPLEC算法进行求解,得到两种不同叶型离心泵内固相浓度、速度等参数的分布和变化规律,并对其结果进行比较和分析。模拟结果表明:在输送相同初始固相体积浓度时,分流短叶片离心泵内固相浓度分布均匀性明显高于原型离心泵;对于分流短叶片离心泵,流道内固相颗粒浓度分布均匀性随着初始固相体积浓度的增大而减小;分流叶片离心泵内速度等值线基本与叶型平行,减小了流动损失。采用分流短叶片,对于改善离心泵内流动状态,减小流场脉动,降低冲击损失和叶片磨损具有重要意义。所得结论对于指导实际应用以及为分流短叶片固液两相流离心泵的设计提供参考依据。In order to study the motion performance of the solid-liquid two-phase flow field in the centrifugal pump with short splitter vanes,the Fluent software is used to simulate the solid-liquid two-phase flow fields in the centrifugal pump with short splitter vanes and prototype centrifugal pump,respectively.With the multi-reference coordinate system,the finite volume method is applied to disperse the Reynolds time-average N-S equation,and the standard k-ε turbulent flow model and SIMPLEC arithmetic are used to solve the equation.The distribution and variation of the solid-phase concentration and velocity in the centrifugal pump with two types of vanes are obtained and compared.The results indicate that when transporting the same initial solid-phase volume concentrations,the distribution of solid-phase concentrations is more uniform in the centrifugal pump with short splitter vanes than that in the prototype centrifugal pump.In the centrifugal pump with short splitter vanes,the distribution uniformity of solid-phase concentrations decreases with the increasing of the initial solid-phase volume concentration.The velocity isoline is basically parallel with the vane profile in the centrifugal pump with splitter vanes,resulting in the reduction of the loss of flow.The adoption of the short splitter vanes improves the flow state and reduces the impulse of the flow field in the centrifugal pump,which can lower the impact loss the abrasion of vanes.The conclusion can provide references for the guidance of the practical application and the design of the solid-liquid two-phase flow centrifugal pump with short splitter vanes.

关 键 词：分流短叶片 离心泵 固液两相流场 数值模拟 

分 类 号：TH311[机械工程—机械制造及自动化]