Optimization of flanges for diffuser casings of diffuser augmented wind turbines

Diffuser Augmented Wind Turbines (DAWTs) are used in harnessing of wind energy in a more efficient way compared to the conventional wind turbines. In this article, the mass flow rate through the shroud is increased by the addition of flanges at the aft of the shroud. Using Reynolds Averaged Navier S...

Full description

Saved in:
Bibliographic Details
Main Authors: Gaonkar, Ashwini Anand, S., Surya, R., Jayakrishnan
Format: Conference Proceeding
Language:English
Subjects:
Aerodynamics
CAD
Computational fluid dynamics
Computer aided design
Diffusers
Flanges
Flow control
Mass flow rate
Optimization
Reynolds averaged Navier-Stokes method
Rotors
Turbulence models
Turbulent flow
Wind power
Wind turbines
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Diffuser Augmented Wind Turbines (DAWTs) are used in harnessing of wind energy in a more efficient way compared to the conventional wind turbines. In this article, the mass flow rate through the shroud is increased by the addition of flanges at the aft of the shroud. Using Reynolds Averaged Navier Stokes Equation along with k-ω SST turbulence models, the flow properties through the diffuser is obtained. The modeling of the diffuser was done using a NACA 9415 Airfoil in CATIA and running the simulations in ANSYS FLUENT. Grid Convergence Study was done for these results prior to further analysis. The flange angle and the height along with the open-angle of the diffuser were optimized for maximum mass flow rate through the rotor plane. The performance of the diffuser has been analyzed in terms of the swallowed mass flow rate, pressure variation along the diffuser and velocity at the rotor plane.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0024504