Stress Analysis of Turbocharger Turbine based on Fluid-Structure Coupling

Abstract

In order to study the cracking problem of turbine components under high temperature conditions, a global fluid-structure interaction model was established by numerical simulation method. The temperature field distribution of the turbine casing and the stress distribution of typical components were simulated and analyzed. The comparison with the traditional fluid-structure interaction model was carried out. The results show that the temperature field obtained by the global fluid-solid coupling model is highly consistent with the test results, and is more accurate than the traditional model.The increase of Nozzle Ring assembly stress and Vane expansion stagnation are the main reasons for the cracking of parts under high temperature load, which is the cause of cracking. Research results can provide reference for engineering application analysis of turbine casing failure and part structure optimization.