Abstract
Abstract In this study, measurements of the turbulence characteristics for a turbulent boundary layer flow past porous windscreen are reported. Measurement analysis includes maximum mean velocity reduction, maximum Reynolds stress reduction, turbulence intensity profile, turbulent velocity power spectrum, and Reynolds stress structure in the wake region of the windscreen. Results show that the maximum Reynolds stress reduction along the downstream distance from windscreen decays faster than the maximum mean wind speed reduction. The turbulence intensity profiles exhibit self-preserving in the wake region of windscreen for the cases of 15%, 30% and 50% porosity. Power spectrum analysis exhibits that most of the energy containing eddies in the wake region of the windscreen shift to the lower frequencies as the windscreen porosity increases. Quadrant analysis results show that the sweep and ejection events dominate the Reynolds stress contributions in the wake region of windscreen. The Reynolds stress contribution difference between sweep and ejection events becomes significant as the distance from the wall and downstream distance behind the windscreen decrease.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Wind Engineering and Industrial Aerodynamics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
