Aerodynamics of structures immersed in turbulent boundary layers. Experimental (and some numerical) studies
Find out more about subscribing to add all events.
Aerodynamics of structures immersed in turbulent boundary layers. Experimental (and some numerical) studies
Wed, 27/11/2024 - 13:00 to 14:00
Location:
Speaker:
Costin Ioan Coșoiu
Affiliation:
Technical University of Civil Engineering Bucharest, Romania
Synopsis:
The structure of a turbulent boundary layer is complex and requires specialized tools to simulate all its characteristics. At the Aerodynamic and Wind Engineering Laboratory “Constantin Iamandi” (LAIV) from the Technical University of Civil Engineering in Bucharest (UTCB), a Boundary Layer Wind Tunnel equipped with variable roughness elements can simulate different boundary layer flow configurations. This facility enables seamless transitions between various velocity distributions and their corresponding turbulence intensity profiles while maintaining the desired turbulent structure of the flow. Although this tool can be used in many fluid mechanics applications, its primary focus is wind engineering, where the simulated boundary layer represents the Atmospheric Boundary Layer (ABL).
Two studies on the aerodynamics of structures immersed in the ABL exemplify this. The first addresses the flow around the recently rebuilt “Ghencea” Stadium, home of the Steaua Bucharest football club.
The second study presents a small ducted wind turbine experimental model designed for improved performance in low-wind or urban areas. A casing surrounds the wind turbine rotor to increase the flow in its active section and extract more energy from the wind. To achieve this goal, the casing includes air injection slots, which serve as passive flow control devices.
Biography:
Currently, dr. Coșoiu is an associate professor at the Department of Hydraulics, Sanitary Engineering, and Environmental Protection (DHEPM) from the Technical University of Civil Engineering Bucharest (UTCB) and the director of the Aerodynamics and Wind Engineering Laboratory "Constantin Iamadi" (LAIV) within DHEPM-UTCB. In 2009, Dr. Coșoiu earned his Ph.D. in mechanical engineering with a doctoral thesis titled "Contributions to the Optimization of Design and Operation of Wind Turbines.". His research activity is primarily conducted at LAIV, the most significant experimental research infrastructure in Romania for wind engineering and one of the most important in Europe. The laboratory is home to researchers and doctoral students from DHEPM and other departments of UTCB, as well as external collaborators from different universities. Dr. Coșoiu has served as a project director and principal investigator for three competitively won research projects and has been a team member in various research projects funded by public or private sources. His research interests include wind engineering, turbulence, Computational Fluid Dynamics (CFD), mechanical energy conversion from non-polluting sources, hydraulics, and hydraulic machines. Dr. Coșoiu has co-authored over 30 scientific papers and is a founding member of the Romanian Wind Engineering Association (ARIV), currently holding the position of vice president.