基于流固耦合的涡轮叶顶间隙分析研究  

Investigation on Tip Clearance in a Turbine Based on Fluid-solid Coupling

作　　者：刘攀[1] 吴亚东[1] 杜朝辉 

机构地区：[1]上海交通大学航空航天学院,上海200240 [2]机械与动力工程学院,上海200240

出　　处：《科学技术与工程》2015年第27期84-89,99,共7页Science Technology and Engineering

基　　金：国家自然科学基金资助项目(11202132);2011先进航空发动机协同创新计划资助

摘　　要：利用CFX对不同叶顶间隙下3级涡轮的运行工况展开数值模拟,对涡轮的气动性能进行了分析。以已计算得出的流场作为气动载荷,利用workbench平台对涡轮叶片的结构特性进行单向流固耦合分析。综合考虑了叶顶间隙以及叶片、轮盘和机匣变形量之间的相互作用。研究结果表明,叶顶间隙对流场的气动特性产生了影响,而因流场气动力而产生变形的叶片和轮毂又使叶顶间隙发生了改变;在涡轮运行过程中叶片径向变形量要大于轴向变形量,并且温度是影响叶片及轮盘变形的最主要原因。The aerodynamic computation of a three stage turbine that has some different tip clearance height blade was done using CFX. Based on the solution of CFX computation, structure characteristics computation was done with single direction Fluid-Solid Coupling method on workbench. The overall consideration about the interaction of tip clearance and the deformation of blade and disc and casing was done. The solution shows that rotor blade and disk have larger radial deformation than axial deformation, and the thermal load has the most important effect on turbine deformation.

关 键 词：涡轮 叶顶间隙 流固耦合 变形 

分 类 号：V235.13[航空宇航科学与技术—航空宇航推进理论与工程]