基于流固耦合的增压器涡轮叶片结构强度分析

摘要

采用ANSYS Workbench软件建立涡轮流固耦合仿真计算平台。首先，运用CFX软件对涡轮流体域进行流体动力学计算。随后，将流固交接面的温度、压力分布场加载到涡轮固体域表面，并进行稳态热计算。最后，运用ANSYS软件有限元分析模块对涡轮考虑气动温度载荷、压力载荷和离心力载荷的进行综合结构强度计算研究。结果表明，所分析的涡轮叶片根部的中间部分及近出口处存在应力集中现象，与用户反馈的该款增压器使用中涡轮叶片断裂部位较为吻合。%Turbo fluid-structure interaction simulation platform was built through the use of ANSYS Workbench software. Firstly, CFX software was used to conduct fluid dynamic calculation. Secondly, temperature and pressure distributions of fluid-solid interfaces were transmitted to solid area surfaces for steady-state thermal calculation. Thirdly, taking aerodynamic thermal load, pressure load and centrifugal load as consideration, ANSYS Static Structural was used for turbo comprehensive strength calculation study. The results indicate that the middle and outlet of blade root see stress concentration phenomenon, which is in accord with the fracture region of customers' feedbacks.