Mixed-inflow turbines are suitable for many applications, where compact power
sources are required with higher boost pressure. Realizing the growing importance and
availability of road vehicles operating over wide range of speeds and loads, our point of
particular interest must be a reduction of gas pollutants which could be achieved by exploring
different design possibilities in order to increase the machine efficiency. This will certainly lead
to a decrease in fuel consumption resulting in a fall of C02 gas emission amount. This paper
focuses on the performance predictions of a turbocharger Twin-entry mixed inflow turbine. The
ANSYS-CFX code is used to solve the equations of a viscous, compressible, turbulent, highly
unsteady and three dimensional turbine inflow. The computed results agree reasonably well
with experimental data. Twin-entry turbine provides the best compromise in terms of
performances at different pressure ratio, and significant increase in swallowing capacity
probably due to the better flow guidance, a more uniform thermodynamic parameters and Mach
number around the rotor inlet.
Keywords: mixed inflow turbine; twin-entry volute; C02 emission; pulsed flow.
full paper (pdf, 1888 Kb)