Advanced Wind Tunnel for Road Vehicles in RING of Kinki Univ.

研究代表者共同研究者publisher[Abstract] An advanced wind tunnel has been introduced as facilities for development of road vehicles in research institute of fundamental technology for next generation of Kinki University, i.e., in KURING. The characteristics of this wind-tunnel which can generate arbitrary pattern of wind velocity varying with time were described firstly. The representative airflow patterns are four in a steady-velocity wind, a pulsating-velocity wind, a gust of wind, and stepwise changing wind. A preliminary experiment was made of the steady wind in three types of vehicle model and theaerodynamic forces acting on the models were compared. Subsequently, a fundamental experiment was conducted of an Ahmed's vehicle model under a pulsating airflow condition and a discussion was given for the unsteady aerodynamic forces. These results suggested that the windtunnel is very useful to investigate the unsteady aerodynamics for road vehicles