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"Study of a Fully Developed Wind Turbine Array Boundary Layer, " Marc Calaf

Speaker: Marc Calaf, Environmental Engineering, Ecole Polytechnique Federale de Lausanne -- Wind harvesting is fast becoming an important alternative source of energy. As wind farms become larger, they begin to attain scales at which two-way interactions with the atmospheric boundary layer (ABL) must be taken into account.

Location: Engineering Quad E225

Date/Time: 12/01/11 at 12:30 pm - 12/01/11 at 2:00 pm

Several studies (Baidya et al. 2004; Baidya et al. 2010) have shown that there is a quantifiable effect of wind farms on the local meteorology, mainly through changes in the land-atmosphere fluxes of heat and moisture. Also, it is well-known that when wind turbines are deployed in large arrays, their efficiency decreases due to complex interactions among themselves and with the ABL. For wind farms whose length exceeds the height of the ABL by over an order of magnitude, a “fully developed” flow regime can be established. In this asymptotic regime, changes in the stream-wise direction can be neglected and the relevant exchanges occur in the vertical direction. Such a fully developed wind-turbine array boundary layer (WTABL) has not been studied systematically before. Now, a suite of Large Eddy Simulations (LES), in which wind turbines are modeled using the classical `drag disk' concept, are performed for various wind turbine arrangements, turbine loading factors, and surface roughness values. Further, simulations including scalar transport from the ground surface without stratification, are also performed.

This will be a brown bag seminar.

Category: Sponsored & Affiliated Events

Department: Princeton Environmental Institute (PEI)