2叶片潜水搅拌机叶轮内部流场特性  

Inner flow characteristics at impeller of submersible mixer with two blades

作　　者：田飞[1] 施卫东 张启华 张德胜 张光建 

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013 [2]国家水泵及系统工程技术研究中心,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2013年第4期395-398,434,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：国家博士后科学基金资助项目(2011M500117);国家自然科学基金资助项目(51079063);江苏省普通高校研究生科研创新计划项目(CX10B_264Z)

摘　　要：为研究2叶片潜水搅拌机叶轮内部流动规律,利用Fluent 6.3大型计算流体力学软件,采用RNGk-ε湍流模型和SIMPLE算法,对2叶片潜水搅拌机搅拌的污水处理池进行数值模拟,分析了2叶片潜水搅拌机叶轮内部流场、压力和速度环量的分布情况.结果表明:叶轮内从叶片工作面到叶片背面流体速度梯度、压强梯度明显;叶片工作面附近流体流速低、压力高,在叶片背面有高速区和负压区;叶轮进出口轴面速度均呈抛物线分布,进出口速度环量变化较为平缓;叶片出口轴面速度均呈近似等轴面速度分布,进出口速度环量呈线性规律分布;叶轮内部流动稳定,这种流型设计可以较好地减少2次回流,叶轮可以高效运行.To investigate the performance of submersible mixer, according to k -ε turbulence model and SIMPLE algorithm, the fluid in the cesspools with submersible mixer was simulated by Fluent 6.3 MRF technology. Inner velocity flow, pressure and circulation of high speed submersible mixer were analyzed. The numerical simulation results show that the gradient of velocity and pressure is significant from blade working face to back in impeller. The fluid velocity near blade working face is low with high pressure. There are high velocity and negative pressure zones near suction side. The axial velocity shows a parabolic distribution at impeller inlet and outlet with gentle change of velocity circulation. The axial velocity is approximately uniform at blade outlet with linear distribution of velocity circulation at blade inlet and outlet. The inner flow in impeller is stable to ensure decreased inverse flow with high operating efficiency of impeller.

关 键 词：潜水搅拌机 流场分析 速度环量 轴向速度 数值模拟 

分 类 号：S277.9[农业科学—农业水土工程] X703.3[农业科学—农业工程]