The number of blade effects on the performance of a mixed turbine rotor
Keywords:
mixed flow turbine, performance, efficiency, finite volume method, ANSYS-CFXAbstract
Turbochargers have become widely applied to
diesel vehicle engines. The mixed flow turbine
type is suitable for systems where compact power
sources are required with higher boost pressure.
The sensitivity of the rotor to incidence effects
and tendency of the flow to separate have given
rise to considerations of the optimum number of
blades. This paper investigates the performance
of a mixed inflow turbine under steady
conditions with the effect of the blade number.
This study deals with the determination of the
performance characteristics of a mixed flow
turbine by solving numerically the 3D Reynolds
averaged Navier-Stokes equations. The ANSYSICEM
software is used to build the geometry and
generate the unstructured meshes while the
ANSYS-CFX code is used to simulate the flow in
the mixed flow turbine.
The numerical method is also used to determine
optimum geometrical characteristics such as the
optimum number of blades. It has been found that
the rotor with 14 blades exhibits better
performance.
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