Design Technique on Enclosure Openings Using Adjoint Method for Vehicles with Low Ram Pressure

Abstract

The ram pressure is lower than the total pressure of the cooling fan in stationary or low-speed vehicles, and the heat is typically managed by the speed of the cooling fan or opening the enclosure. However, the long-term noise exposure to the working space can be a problem due to stationary or low speed operation. In this paper, the opening search technique for the enclosure using the adjoint method has been proposed to solve the dilemma between heat management and noise control.