An experimental study on the base pressure drag reduction of a simplified tractor-trailer

단순화도니 트랙터-트레일러의 기저 압력저항 감소에 관한 실험적 연구

The effect of base cavities on the drag of a simplified tractor-trailor model for Re=4.1*10$^{5}$ is investigated experimentally. Three different types of base cavities are studied in this work. They are solid-wall, slitted-wall, and slotted-wall cavities. Slotted-wall cavity is found to be most effective for drag reduction. A maximum of 11% reduction in the zero-yaw drag coefficient is achieved with the slotted wall cavity.