基于流固耦合的压气机叶片拓扑优化研究

为解决气流载荷和离心力耦合作用下压气机叶片应力应变过大问题,以离心式压气机叶片为研究对象,通过ANSYS Workbench仿真平台对叶轮叶片进行单向流固耦合数值模拟,得到的应变与应力主要集中在进口叶片较薄处,易产生疲劳破坏.采用GENESIS模块对叶片进行应变与应力多目标拓扑分析,基于拓扑结果在BladeGen重建叶...

Research on Topology Optimization of Compressor Blade Based on Fluid-Structure Coupling

Aiming at solving the problem of excessive stress and strain of compressor blades under the coupling effect of air load and centrifugal force,centrifugal compressor blades are taken as the research object,and the unidirectional fluid-structure coupling numerical simulation of the impeller blades is carried out through the ANSYS Workbench simulation platform.Strain and stress are mainly concentrated in the thinner part of the inlet blade,which is prone to fatigue failure.The GENESIS module is used to perform multi-objective topology analysis of strain and stress on the blade.Based on the topology results,the blade model is reconstructed and optimized in BladeGen.Without changing the diameter of the impeller inlet and outlet,the blade outlet height is appropriately reduced and the blade tip curvature is increased,and the strain concentration area is appropriately reduced.Moving to the thicker part of the blade tip,strain and stress are reduced.Multi-objective topology analysis provides a suitable optimization model,which has more design freedom than the previous size optimization,improves efficiency and obtains ideal results.