Research Of The Approach For Designing The Scroll-Nozzle's Vanes Of Radial Inflow Turbine Based On Lower Flow Loss Function Figure

The direction of internal combustion engine development is to a great extent by using the turbocharger technology. In recently years, turbocharger technology was applied on most kinds of internal combustion engines to raise the engine output, low the fuel consumption and eliminate the emission pollutions. The solution has obtained dramatically positive effect for solving the energy sources and environment problem. The key of the turbocharger research is how to augment the energy conversion efficiency. It's proved by the theory research that if the others conditions keep constant, the nozzle velocity coefficient has more influence affect the volute efficiency than the vane speed coefficient. If the nozzle velocity coefficient rises 1%, the volute efficiency rises 1.5-2% correspondingly, and if the vane speed coefficient rises 1%, the volute efficiency rises 0.1-0.2%. So, promoting the volute energy conversion efficiency by reducing the nozzle flow loss is the basilic route during the turbocharger design. This paper is concentrated on the approach for designing the volute vane function figure with lower flow loss and high efficiency by the numerical calculation and analysis of the volute flow field and nozzle flow field.The airflow in the turbocharger volute scroll is 3-D compressible viscosity flow. Since the complex structure, it's very difficult to have the particular analysis of the volute. Among the literatures of the analysis, there used to be simplified or presumption such as 3-D to 2-D, compressible to uncompressible, viscosity to un-viscosity, etc. The calculation method may be Finite Difference Analysis, Finite Element Analysis and Finite Volume Method, etc.The innovation research in this paper is that adopted the synthesis...