Automotive Turbocharger Radial Turbine CFD and Comparison to Gas Stand Data 2011-36-0081
Nowadays, most diesel engines are turbocharged. This component
was proved of great importance to bring power and torque levels of
diesel engines to those of its gasoline counterparts. Also,
turbochargers help diesel engines achieve the most strict emissions
levels. The design of more effective turbocharger components
provides more room for increased engine performance levels.
This study evaluates the performance of a radial inflow turbine
typically used in commercial diesel engine turbochargers. The CFD
commercial code Ansys CFX 11.0 was used to reproduce the operating
environment seen in Gas Stands to obtain the performance map of
such radial turbines. Only volute and radial turbine geometries
were meshed and simulation was run as adiabatic and steady-state.
The turbulence model κ-ω SST was chosen for calculations. All
simulations were in good agreement with experimental results from
Gas Stand testing from the point of view of mass flow parameter. A
shift in efficiency was expected due to divergences between data
measurement and calculation using CFD.
The main motivator of this work is to develop a methodology for
running CFD calculations for future predictions of the trend that
geometrical changes on the turbine mass flow parameter and