ASA 125th Meeting Ottawa 1993 May

2pNS2. Aerodynamic noise of high-speed ground vehicles.

Bennett M. Brooks

Brooks Acoust. Corp., 27 Hartford Turnpike, Vernon, CT 06066

A potentially serious problem for high-speed ground transportation vehicles is the aerodynamic self-noise generated simply by the vehicular movement through the air. This noise constitutes the floor to the total noise produced by the vehicle regardless of the method of propulsion. Several methods of calculating the sound pressure levels of this aerodynamic noise are developed based on the interaction of turbulent boundary layer flows with solid surfaces. These calculations are applied to a model for a high-speed train. Calculated noise levels compare favorably with the levels measured for unpowered vehicles operating at typical high speeds. [Work partially supported by United Technologies Corporation.]