Circular Flow Field Simulation And Blade Profile Optimization Of Turbocharger Nozzle

Nowadays,we are facing the serious problem of energy shortage.People’s over exploitation of energy has caused a great threat to our life,and the pollution to the environment is more and more serious.This situation makes people realize that we should face the energy and environmental problems correctly.In the face of this serious problem,the research and development of turbocharging technology provides great help to solve the environmental and energy problems.The research and development technology of automobile manufacturing has become a topic of great concern,and turbocharging technology is undoubtedly the key core of this field.Turbine is one of the most important parts in turbocharging system.The performance of turbine directly affects the working effect of turbocharger,and then indirectly affects the output efficiency of engine in the whole working operation.In this paper,the zn310 g axial-flow turbocharger is taken as the research object.On the basis of the turbine,the nozzle ring of the turbine is optimized,and the flow field of the nozzle ring is simulated and analyzed.The performance of the nozzle ring with different structures is compared and analyzed,and the appropriate nozzle ring is selected under high-speed and low-speed conditions to achieve the purpose of optimization.First of all,three parts of turbine nozzle ring,impeller and main shaft are modeled by CATIA,and the nozzle ring profile is modified,and the model is assembled.In the design,the thickness and number of nozzle ring blades are optimized,and six turbine models with different structures are reconstructed.Finally,the grid of these six turbine models is divided under the environment of ANSYS ICEM CFD software,and the calculation model of nozzle ring flow field is obtained.In the flow field analysis,high-speed and low-speed conditions are used.High condition refers to the rated condition of the engine,while low condition data uses 40% of the high condition data.Through ANSYS Fluent flow field analysis software is used to analyze the internal flow field of the six structures of the nozzle ring,obtain the velocity,temperature and pressure cloud chart,and obtain the velocity and pressure value of the nozzle ring outlet,compare the cloud chart and data of the six different structures of the turbine nozzle ring outlet,analyze and draw the optimization conclusion: the nozzle ring with 28 5mm thick blades is suitable for the zn310 g turbocharger,finally The feasibility of the optimization result is verified by comparing the calculation result with the optimization result.