水力机组流固耦合的数学模型

NUMERICAL SIMULATION OF FLUID-SOLID COUPLING FOR VIBRATION IN HYDRAULIC MACHINE

流固耦合具有强烈的非定常、非线性,因此黏性效应不可避免。文中基于有限元法建立水力机组流固耦合振动的控制方程。通过对现有代表模型的讨论和比较可以看出,文中导出的方程模型是目前较为完善的水轮机组部件流固耦合运动的非线性动力模型。最后分析用ANSYS软件进行流固耦合计算的可能性。

The research of fluid-solid coupling has sharp unsteady and nonlinear character, so the effect of viscosity have to be considered. A nonlinear equation of fluid-solid coupling for vibration of hydraulic-turbines was developed based on finite element method. Compared with those already in existence, the model given is a more complete, nonlinear one. Finally,feasibility is analysed, to calcutate fluid-coupling equation using ANSYS.