Three-dimensional Design Optimization for Fir-tree Root of Turbine Blade with Finite Element Method
Fir-tree root is widely used inblades of gas turbine and large power steam turbine. The structure of root and rim affects the security of the entire blade to a certain extent Based on the parametric design language APDL, the fir-tree root and rim with complex three-dimensional contact stress, are numerical studied and optimized with multi-variable using the finite element software ANSYS. The zeroorder optimization algorithm and the first-order optimization algorithm are combined in the optimization process to enhance the credibility of results. A novel structure of the turbine blade firtree root and rim is then obtained. Moreover, numerical results show that equivalent stress has a reduction after the multi-variable optimization when the maximum equivalent stress of root is set as the objective function. Compared with the results of the initial design, the maximum equivalent stress of the root of the optimized design reduces by 4.56％, and the maximum equivalent stress of the rim reduces by 4.40％. Relevant results are expected to support the design of turbine blade in theory and then improve the operation reliability of turbo-machinery to some extent
design optimization fir-tree root turbine blade maximum equivalent stress
Ma Dandan Zhang Di Xie Yonghui
Department of Power Machinery Engineering,School of Energy & Power Engineering, Xian Jiaotong University, Xian,710049, China
国际会议
2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)
西安
英文
998-1001
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）