流体机械

2015, v.43;No.517(07) 10-15

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多级离心泵转子的流固耦合特性及试验分析
Characteristic and Experimental of Fluid-structure Interaction of Multistage Pump Rotor

王其磊;陈国栋;
WANG Qi-lei;CHEN Guo-dong;Chinese People's Armed Police Forces Aorces Academy;Zhejiang Jinhua Fire Detachment;

摘要(Abstract):

针对高功率密度液体多级离心泵的高速化发展带来的流固耦合及临界转速等问题,根据流固耦合计算方法,并应用Ansys软件系统对流场网格进行划分和边界条件设定,然后进行数值模拟计算。计算结果表明:首级叶轮到后部末级叶轮应力、应变和变形呈增大趋势,这符合多级泵叶轮受力分布的实际情况,流固耦合相对于重力来说发挥了更显著的作用。可以看出流固耦合后转子固有频率降低,并且阶数越高,下降幅度越大,旋转软化效应对第一阶弯振影响较小,而对二、三、四阶的影响逐渐增强,且随转速均匀增加,弯振频率均匀变化。试验测试结果与仿真结果具有较好的一致性,反映了仿真数据的正确性。
The fluid-structure interaction and critical speed problems from the high speed development the multistage centrifugal pump of high power density fluid based on the fluid-structure equations of fluid flow and solid system,the grid division of flow field and boundary conditions were set by applying Ansys software,and the vibration test rig was set up. The calculation results show that: the stress,strain and deformation of the head to the back of the impeller showed a increase trend,this accords with the actual situation of the stress distribution of multistage pump impeller,the fluid-structure interaction relative to gravity has played a more prominent role,it can be seen after the fluid-structure coupling rotor natural frequency is reduced,and the higher order lead to the greater drop,the spin softening effect on the first order bending vibration was small,and the influence of the two,three,four order gradually strengthen,and with increasing uniform speed,the bending vibration frequency uniform change. Through the experiment test and the simulation results had good consistency,which reflected the correctness of the simulation data.

关键词(KeyWords): 多级离心泵;流固耦合;临界转速;固有频率
multistage pump;fluid-structure interaction;critical speed;natural frequency

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基金项目(Foundation): 河北省高等学校科学技术研究项目(Z2013047)

作者(Author): 王其磊;陈国栋;
WANG Qi-lei;CHEN Guo-dong;Chinese People's Armed Police Forces Aorces Academy;Zhejiang Jinhua Fire Detachment;

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