氦气涡轮转子系统整体数值仿真研究

Numerical Simulation of Helium Turbine Rotor System

针对氦气涡轮转子系统中各构件复杂的非线性接触关系及结构强度问题,采用Pro/E建模软件对氦气轮机转子系统进行了3维实体造型,并利用ANSYS软件进行了数值仿真强度分析。真实模拟了涡轮转子在4种工况下的应力分布以及变形趋势。结果表明:除接触应力和开孔处应力较大外,在转子轴系整体强度计算中,各级轮盘盘心处应力较大。根据各工况下的计算结果比较分析得出,离心力对盘心处的应力影响最大,对温度场的影响次之。

Aiming at the complex nonlinear contact relationship and structural strength problems in a Helium turbine rotor system, the three-dimensional solid modeling of the Helium turbine rotor system was built by the Pro/E modeling software, which structure strength was numerically simulated by the ANSYS. The stress distribution and deformation trends of the turbine rotor were simulated in the four operations. The results show that the contact stress and open hole stress in the overall strength calculation of the rotor axial system are large, and the stress in the middle of turbine disk is large also. According to the analysis of calculation results contract in different operations, the centrifugal force has more influence on the stress of middle disk than that of the temperature field.