螺旋离心泵固液两相非定常流动诱导力特性  

Inducted force characteristics of solid-liquid two-phase unsteady flow in screw centrifugal pump

作　　者：张钊[1] 苏敏[2] 韩伟[1] 李仁年[1] 权辉[1] 黎义斌[1] 

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]兰州理工大学电气工程与信息工程学院,甘肃兰州730050

出　　处：《排灌机械工程学报》2015年第4期296-300,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51079066;51209113)

摘　　要：采用雷诺平均N-S方程,结合滑移网格技术对150×100LN-32型螺旋离心泵进行了固液两相非定常流动的数值计算,给出了在不同固相体积分数下蜗壳出口面的压力脉动、叶轮径向力、叶轮轴向力以及作用在叶轮上扭矩的分布规律,并分析了固相体积分数的变化对其大小和方向的影响.结果表明,不同固相体积分数对蜗壳出口面压力、作用在叶轮上的扭矩、轴向力和径向力在1个周期内的变化趋势和力的方向没有影响,但各个力的大小随着固相体积分数的增加而增大;蜗壳内壁各监测点的压力在1个旋转周期内呈波动状态,并且波动趋势明显不同,这与各监测点的位置和叶轮与蜗壳之间的干涉作用有关,随着叶轮的旋转,在螺旋叶片的作用下,全流道内的压力顺着蜗壳内壁沿叶轮旋转的方向逐渐增大;固相体积分数的改变对蜗壳内各监测点的压力脉动趋势影响较小,固相体积分数的增加使得各监测点的压力值随着固相体积分数的增加而增加,但是固相体积分数变化对蜗壳表面压力波动的幅值影响较小.Numerical simulation of solid-liquid two-phase unsteady flow in the 150 × 100LN-32 screw centrifugal pump was simulated by using unsteady Reynolds averaged Navier-Stokes equations and moving mesh.The distributions of the pressure at volute outlet,radial force,axial force and total moment were presented and the influence of different solid-volume fractions on the value and direction of inducted force.The results show that different solid-volume fractions have no effect on the trend and direction of pressure at volute,radial force,axial force and total moment during one period,but the values of inducted forces increase with the solid-volume fraction increasing.The pressure on the monitoring points have fluctuations with different trends during one period,which depends on the direction of themonitoring points and the interaction of impeller and volute.With the rotation of the impeller,the pressure in the whole passage is further increased in the direction of the impeller rotation with the effect of impeller; different solid-volume fractions have no effect on fluctuation trend of monitoring points,but the values of pressure on monitoring points increase with the solid-volume fraction increasing.

关 键 词：螺旋离心泵 固液两相流 非定常 诱导力 

分 类 号：TK7[动力工程及工程热物理—流体机械及工程]