Potential Flow Calculations of Axisymmetric Ducted Wind Turbines
Name
turbine3.pdf
Size
1.47 MB
Format
Adobe PDF
Checksum (MD5)
e24b6b2deffb8f85f9569db1efb81cbf
Author(s)
Widnall, Sheila
Date Issued
September 2, 2009
Abstract
An incompressible potential-flow vortex method has been constructed to analyze the flow field of a ducted
wind turbine following that outlined by Lewis (1991). Attention is paid to balancing the momentum change
in the flow to the total longitudinal forces acting on the duct-turbine combination: the pressure force on
the actuator disk plus the pressure forces acting on the duct, which typically includes a negative component
of drag due to high leading-edge suction. These forces are shown to balance the momentum changes in
the flow, resulting in a model for power output from a ducted wind turbine over a wide range of pressure
changes across the actuator disk. The results are compared to the Betz actuator disk model and it is shown
that the maximum power output from a ducted turbine occurs at a lower value of pressure drop/momentum
extraction than that for a bare turbine.
Subjects
duct wind trubine potential flow vortex method
Persistent DSpace Link
