基于ANSYS Workbench叶轮叶片流固耦合分析

Fluid-solid Coupling Analysis of Centrifugal Impeller Blades Based on ANSYS CFX

以离心泵叶轮为研究对象,设定不同的两种工况(120/160L/s),基于Navier-Stokes方程和SST k-ω湍流模型,构建两者的内流场模型,次而根据其受力建立叶轮叶片的静力平衡方程,设置边界条件,施加载荷,最后求解得出结果。在流场的数值模拟中,由于考虑到离心力及流场对叶片的表面压力的影响,将内流场网格连接CFX模组进行流场模拟。在结构场中,导入CFX计算得出的水压力数值,最后求解得到叶片在两个工况下的应力应变情况。分析结果表明,叶轮叶片都能在两种工况下正常的运行。

The research object in this paper is centrifugal impeller. Two differentoperating conditions （120/160L/s）are set. The internal flow field model of the two operating conditions are established based on Navier-Stokes equation and SST k-to turbulence model. And then the static equilibriumequation of the impeller blades is built according to the stress to setboundary condition and add load. Finally the result is calculated. In fluidnumerical simulation, as a result of considering the influence of centrifugalforce and rotating fluid on the pressure for blades, flow field simulation iscarried out to the internal flow field grid connection CFX module. Import the waterpressure value calculated by CFX in structure field. Finally the stress-straincondition of the blade under the two working conditions are obtained. Theresnhs show that the impeller blades can run normally in two conditions.