Simulation Research On Turbine Strength And Volute Inclusion Of Axial Turbocharger

With the continuous improvement of people’s requirements for engine performance,turbo-charging technology arises at the historic moment.Turbocharging technology can not only improve the performance of the engine,but also reduce the consumption of fuel energy and the emission of harmful gases,which is of great significance to China’s energy development and environmental protection.At present,the research of turbocharger is mainly focused on how to improve the boosting effect and improve the engine performance,and less attention is paid to the housing inclusion.At present,the research and experiment on the containment of aero-engine casing have gradually matured,but the research on the containment of turbocharger volute is rare.Therefore,this paper mainly studies the containment of turbine casing.First of all,the three-dimensional modeling software Solidworks is used to build the three-dimensional model of each component of the axial-flow turbocharger turbine,and then it is assembled.The finite element analysis software ANSYS is used to mesh the turbine and analyze the strength of the turbine.Set turbine strength calculation and analysis under four different working conditions of low speed,medium speed,high speed and overspeed.According to the calculation results,the working conditions and failure positions of the turbine which are prone to failure are determined.Due to the structure of the turbine hub,the turbine hub may be more prone to failure.Assuming that the hub is evenly divided into four parts and has a fan shape,the high-speed impact numerical simulation of hub debris and volute(volute thickness is 8mm)is carried out by LS-dyna software.According to the energy conversion and distribution of the hub in the process of impacting the volute,the mechanism of the turbine hub impacting the shell can be understood more clearly.Finally,the improved volute thickness is set to 5mm and 10 mm.Comparing the numerical simulation results and analyzing the volute stress,energy absorption and hub speed variation diagram,it is concluded that 10 mm volute thickness is more inclusive.The conclusion of this paper can provide a certain basis for the promotion and development of subsequent turbines and has certain significance for the research of turbochargers.The numerical simulation of hub impacting volute provides a reference for the safety research of supercharger.