基于流固耦合的离心式压气机叶轮叶片仿真研究

Simulation Research on Impeller Blade of Centrifugal Compressor Based on Fluid-Structure Coupling

中文关键词: 离心式压气机  叶片 流固耦合  热载荷 应力  应变

英文关键词: Centrifugal compressor  blade  fluid-solid coupling  Thermal load  stress  strain

中文摘要:

      以某型离心式压气机叶轮为研究对象,利用ANSYS工程软件对叶轮进行单向流固耦合数值模拟。在综合考虑热载荷对叶轮叶片应力应变影响的前提下,建立叶轮单流道的三维流场模型,得到额定转速下压气机叶轮内部流场应力分布。将离心力、气动力和热载荷施加到叶片上,最终得到在离心力、气动力和热载荷三者共同作用下的叶片应力分布和叶片最大变形量,结果显示：相比仅考虑离心力和气动力影响的情况,在施加热载荷后,叶片最大应力增加7.62%,最大变形量增加24.69%。

英文摘要:

      The one-way fluid-solid coupling method was adopted to numerically simulate a centrifugal compressor impeller by using ANSYS engineering software. Based on the comprehensive consideration of the influence of thermal load on the stress and strain of the impeller blade, the 3D flow field model of the impeller single-flow channel was established, and the internal flow field and stress distribution of the compressor impeller under the rated speed were obtained. After the centrifugal force, aerodynamic force and thermal load were applied to the blade at the same time, the stress distribution and the maximum deformation of the blade were finally obtained. The results show that the maximum stress of the blade increases by 7.62%, and the maximum deformation increases by 24.69% after the thermal load is applied, compared with the results obtained by only considering the centrifugal force and aerodynamic force.