• Dr. Stewart A. L. Glegg
  • Florida Atlantic University
  • Holden Auditorium
  • 4:00 p.m.
  • Seminar Host: CREATe

The noise from wind or water turbines present some unique operational issues that remain a challenge for the designer. The environmental impact of these systems can restrict the placement of wind turbine farms and impose operational restrictions that reduce their power output. This seminar will discuss how wind or water turbine noise is generated. It will be shown that the sound is primarily caused by flow over the blades. Modulation effects can be caused by the motion of the blades, the wind shear in the atmospheric boundary layer, and intermittent blade stall. The relative importance of these mechanisms will be discussed. We will also review the mechanisms of underwater sound generation for offshore systems, and the possible impacts that this may have on wind or water turbine operations.

Biography:

Dr. Stewart A.L. Glegg received his Ph.D. from the Institute of Sound and Vibration Research, Southampton University, U.K. in 1979 for studies in acoustics. He was a research specialist with Westland Helicopters, U.K. for two years (1977-1979) and then joined the Institute for Sound and Vibration Research, Southampton University (1979-1985) as a faculty member sponsored by the Navy working on Hydroacoustics. In 1985 he joined the faculty in the Department of Ocean Engineering at Florida Atlantic University. He was a Visiting Scholar at Scripps Institute of Oceanography in 1991, and from 2001 until 2003 he was Chairman of the Department of Ocean Engineering at Florida Atlantic University, and Director of SeaTech. He is currently the Director of the Center for Acoustics and Vibration at FAU. He is an Associate Fellow of the American Institute for Aeronautics and Astronautics, and a member of the Acoustical Society of America, the American Helicopter Society, SNAME, and ASME. He was an Associate Editor for the AIAA Journal (1994-97) and serves on the editorial board of the Journal of Sound and Vibration. In May 2004 he was awarded the American Institute for Aeronautics and Astronautics Aeroacoustics Award for "Outstanding contributions to the understanding and reduction of fan noise in turbo machinery". He has published over 140 technical papers in leading scientific and engineering journals including the Proceedings of the Royal Society, Nature, the Journal of Sound and Vibration, the Journal of the Acoustical Society of America and the AIAA Journal.