基于流固耦合方法的离心式压气机叶片强度与振动特性研究

摘要

Abstract; One-way fluid-solid interaction analysis of centrifugal compressor with the splitter blade was researched by the fluid dynamics and finite-element method. The three-dimensional model of one-way passage for the impeller was established. With the model, the stress distribution of internal flow field was acquired. Acting on the impeller blade with aerodynamic force, the stress distribution and maximum deformation of main blade and splitter blade, which were acted simultaneously by the centrifugal and aerodynamic force, were acquired. Finally, the influences of centrifugal and aerodynamic force on blade stress-strain and vibration characteristic were compared and analyzed.%采用流体动力学及有限元方法,对某型带分流叶片的离心式压气机叶轮进行了单向流固耦合分析.建立了叶轮单个通道的三维流场模型,得到某转速下压气机叶轮内部流场的应力分布,然后将气动力施加在叶片上,获得离心力和气动力共同作用时主叶片及分流叶片上的应力分布及最大变形量,最后对比分析了离心力与气动力对叶片应力应变和振动特性的影响.