Abstract
With the increasing popularity of turbocharging technology in the automotive industry, and people's increasing awareness of environmental protection, engineers are paying more attention to the technical development of turbochargers, while more advanced tools and methods are being used in the actual turbocharged design process to improve the accuracy and efficiency of research and design. Traditional turbocharger design methods are often based on experimental data and empirical models, and long development cycles conflict with market demand, and high performance conflict with high reliability. In this paper, in order to resolve this significant contradiction, a design process based on a variety of CAE methods and tools is proposed for the design of turbines, which are key components of turbochargers. This process was early applied to the design of turbocharger compressor, and then under the original boundary conditions, considering the challenges of high temperature and high engine demand, it has been improved and applied to the design of a 9L off-road country Tier-IV engine turbine in the Chinese market. The analysis shows that the turbine has good aerodynamic performance and structural reliability. The turbine performance was tested in gas stand the also verified on the engine test. This study demonstrated that the design was successful and future new turbine design can use similar procedure.
Highlights
Efforts to achieve more power with less fuel consumption dated all the way back to the very start of engine design
The increasing awareness of energy conservation and environmental protection have demanded engine manufacturing to use better turbocharger system to meet the needs of customers and regulations
The results show that the performance of the optimized turbine is significantly improved than the original turbine
Summary
Efforts to achieve more power with less fuel consumption dated all the way back to the very start of engine design. The development of computer-aided technology Baines and Wallace [2] proposed a numerical turbine design method, introduced a Hanqin Yang et al.: Design of a Radial Turbine for Wastegated Turbocharger quasi-three-dimensional flow field analysis. With the development of numerical methods, a faster, better, and time economic turbomachinery design methods were proposed based on an empirical database combined with computer-aided design This method is used in turbomachinery engineering applications. After the design of the meridian streamlines, more detail three-dimensional optimization is needed, such as thickness analysis, blade load, and off-design performance etc This step mainly adjusts the turbine and turbine housing to achieve the highest efficiency at both the design point and off-design points. The final turbine design should meet both performance and reliability goals
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