Seminar on Large Eddy Simulations of Turbulent Flows Around a Ducted Wind Turbine

15 Sep 2021 10.30 AM - 11.30 AM Current Students, Public

Prof. Chunlei Liang 
 

Mechanical and Aeronautical Engineering, Clarkson University

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Meeting ID: 946 8149 2731
Passcode: 772269

This seminar will be hosted by A/P Eddie Ng Yin Kwee

Seminar Abstract

In this talk, a novel high-order sliding-mesh algorithm for solving compressible Navier-Stokes equations on unstructured grids will be presented. This high-order method is validated against experimental data for turbulent flows around a marine propeller operating at the design condition. Subsequently, the method is applied to analyze the performance of a ducted wind turbine at a Reynolds number of 2.5 Million.  The computational results clearly show that the ducted turbine has higher thrust and higher power outputs than the open-rotor turbine. Vorticity and velocity fields of two configurations are also visualized and analyzed to show the differences. To evaluate the effects of yawed flows, simulations are carried out for both ducted and open-rotor turbines under five different yaw angles of -30, -15, 0, 15 and 30 degrees. The results confirm that the ducted wind turbine has very stable power output when the yaw angles are small.  The ducted wind turbine has higher power outputs than the open-rotor counterpart at all tested yaw angles.

Speaker’s Biography​

Chunlei Liang is a Professor of Mechanical and Aeronautical Engineering at Clarkson University since August 2019. Dr. Liang received his PhD degree from the University of London in Mechanical Engineering and performed a three-year postdoc at Stanford University in the department of Aeronautics and Astronautics before he started his tenure-track position at the George Washington University in 2010.  His research interests include computational fluid dynamics, computational heat transfer, and computational magnetohydrodynamics.  He received an ONR YIP award in 2014, an NSF CAREER Award in 2016, and a PECASE award from the White House in 2019. He is an associate editor of the ASME Journal of Fluids Engineering and an editorial board member of Computers & Fluids, an Elsevier journal.

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