Turbulence and Wind Energy: Small scale, big picture by Dr. Abhijit Chougule

Location and Date: 
Wednesday, January 24, 2018, 12:15 PM, LT 105


Wind energy sector is getting bigger and becoming a major part of social and economical
aspects globally. A wind energy conversion system, such as horizontal axis
wind turbine, extracts energy from the wind in the atmospheric boundary layer (ABL).
The Reynolds number in the ABL is typically very large (Re ⇠ 106–108), so the wind
in the ABL is nearly always turbulent.
Normally, a wind turbine placed at a site will be operating during its life-time period
of ⇠20-25 years. During the period, wind turbulence plays an important role by
affecting– the mechanical loading of individual and clustered wind turbines, and the
electricity production.
This presentation addresses small scale turbulence with the range– from seconds to
hours temporally, and, in the order of meters spatially. First part will explain briefly an
interaction between turbulent wind field and a wind turbine. Secondly, turbulence characteristics
and their modeling—that are important to wind engineers—are discussed.
Finally, effects of turbulence on wind turbine loading and some other issues are discussed.


Dr. Abhijit Chougule earned a bachelor degree in an aeronautical engineering
with the specialization in aerodynamics; a M. Tech. in Earth system science and
technology from the Indian Institute of Technology, Kharagpur; and, a Ph.D. in
Atmospheric turbulence and wind energy from the Risø National Laboratory for
Sustainable Energy, now known as DTU Wind Energy at the Technical University
of Denmark. Of the 130 world-wide applications, Abhijit was selected for the
Ph.D. position at Risø.
After his Ph.D., Abhijit had conducted postdoctoral research at DTU Wind
Energy and University of Agder in Norway. He also had spent time at the National
Center for Atmospheric Research, USA; did consultancy as a private company;
and published in good journals. Abhijit had presented his work at Siemens Wind
Power A/S; Statoil, Norway; and at several seminars and conferences, e.g., the
EAWA PhD Seminars in Delft, Netherlands.