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Flow Behavior in an Asymmetric Plane Diffuser With Fully Developed and Wake Velocity Profiles at Inlet
J. of fluid mechanics • 2007
Publication Information
Authors
Magdy A. Bassily Hanna*, A. M. EL-Kersh**, Ramadan Bassiouny*, Mohamed R. Gomaa*
Keywords
Asymmetric diffuser, pressure recovery, CFD, non-uniform inlet conditions
Journal
J. of fluid mechanics
Publisher
Not Available
Volume
Not Available
Issue
Not Available
Pages
Not Available
publication.type
International
Paper Link
Not Available
Supplementary Materials
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Abstract
Flow through diffusers in general is of great importance in many engineering applications. The
flow in an asymmetric diffuser has been studied experimentally and numerically. The diffuser has
an opening angle of 8 Deg., area ratio of 4.7, and an inlet aspect ratio of 4. Measurements are carried
out to determine the diffuser performance with fully developed turbulent flow and wake flow at
entry to the diffuser. The experimental results showed significant changes in the velocity profiles
and in particular with wake flow inlet condition. Such wake flow leads to deteriorate the diffuser
pressure recovery coefficient and an increase in the total pressure loss coefficient.
Computation of the turbulent flow through the diffuser has been carried out with ANSYS code using
k-ε turbulence model. It is found that the used model is not capable to accurately capture the flow
behavior very close to the walls.
flow in an asymmetric diffuser has been studied experimentally and numerically. The diffuser has
an opening angle of 8 Deg., area ratio of 4.7, and an inlet aspect ratio of 4. Measurements are carried
out to determine the diffuser performance with fully developed turbulent flow and wake flow at
entry to the diffuser. The experimental results showed significant changes in the velocity profiles
and in particular with wake flow inlet condition. Such wake flow leads to deteriorate the diffuser
pressure recovery coefficient and an increase in the total pressure loss coefficient.
Computation of the turbulent flow through the diffuser has been carried out with ANSYS code using
k-ε turbulence model. It is found that the used model is not capable to accurately capture the flow
behavior very close to the walls.