关键词: 敞篷车, 气动噪声, 座舱流场, 声品质, 客观评价

Abstract: CFD is used to carry out numerical simulation research on the cockpit flow field of a convertible, and the variation characteristics of the cockpit flow field of the convertible at different speeds are analyzed, and the aerodynamic noise at the human ear is monitored. The study finds that the air flow on both sides of the cockpit will be swept into the cockpit from behind the seat and form a vortex centered on the human bodies of the two occupants. The air flow behind the cockpit that reverses back and separates from the front windshield collides above the cockpit to form a vortex, which gradually develops into the cockpit. Noise monitoring in the human ear finds that the A-weighted sound pressure level of the outer ear is about 5 dBA greater than that of the A-weighted sound pressure level of the inner ear. Through the objective evaluation of sound quality parameters, it is found that the aerodynamic noise of convertible has the characteristics of louder and less sharp (“rough”) sound source.