斜式轴流泵装置模型的飞逸特性研究  

Study of the runaway character of slanted axial-flow pump

作　　者：金国栋[1] 潘志军[1] 孟金波[1] 张睿[2] 

机构地区：[1]杭州市南排工程建设管理处,杭州310000 [2]上海大学上海市应用数学和力学研究所,上海200072

出　　处：《水动力学研究与进展（A辑）》2013年第5期591-596,共6页Chinese Journal of Hydrodynamics

基　　金：浙江省重大科技专项重点工业项目(2011C11068)~~

摘　　要：为研究三堡排涝泵站斜式轴流泵装置模型的飞逸特性,该文对其进行了飞逸特性试验,研究了不同叶片角度下泵装置模型的单位飞逸转速及其变化规律。试验结果表明,随叶片角度的增大,单位飞逸转速呈下降趋势。为深入了解飞逸工况时泵内部流场特征,基于非定常的数值计算方法,采用滤波器湍流模型,利用ANSYS CFX软件对泵装置模型进行数值计算,求得不同叶片角度下的单位飞逸转速,并对其内部流场进行分析。数值结果表明,飞逸工况时的流量值和单位飞逸转速与试验结果均较为接近,从而验证了数值方法的可靠性。通过对飞逸工况时叶轮内部流场进行分析发现,流体从叶轮尾部流向头部,流场较为光顺,没有出现明显的回流和旋涡;叶片表面压力分布情况与文献[6]中叶片表面压力的分布规律相近,并随叶片角度的增大,叶片吸力面侧和压力面侧的低压区域均呈逐渐增大的变化规律。In order to research the runaway characteristic of the slanted axial-flow pump model of Sanbao Drainage Pumping Station, the experiments about the runaway characteristic of pump model were done, and the changing laws of unit runaway speed with different blade angle were studied. With the increase of blade angle, the experimental results show that the unit runaway speed decreases. For deep understanding of the internal flow field within pump under runaway condition, based on the unsteady Reynolds averaged Navier-Stokes equations with the filter-based turbulent model （FBM）, the pump model were simulated by using ANSYS and CFX. The unit runaway speeds under different blade angles were calculated and the internal flow fields were analyzed. The results show that the flow rate value and the unit runaway speed under runaway condition are in good agreement with the experimental data, and the numerical method is verified well. The internal flow field of impeller passage is relatively smooth and has no obvious vortex. The distribution of pressure on the blade surface at the runaway point is proved to be similar to the result of the reference [6]. In addition, with the increase of the blade angle, the low pressure areas whether on the blade suction surface or on the pressure surface, are both gradually increasing.

关 键 词：斜式轴流泵 飞逸特性 滤波器湍流模型 计算流体动力学 

分 类 号：TV136[水利工程—水力学及河流动力学] TH312[机械工程—机械制造及自动化]