논문 국내 국제일반학술지 Wind tunnel tests on drag reduction of heavy vehicles using sinusoidal boat tails
- 학술지 구분 국제일반학술지
- 게재년월 2020-01
- 저자명 Jeong Jae Kim, Eui Jae Lee, Sang Joon Lee
- 학술지명 Journal of Mechanical Science and Technology
- 발행처명 Springer
- 발행국가 국내
- 논문언어 외국어
- 전체저자수 3
- 연구분야 공학 > 기계공학
홈페이지논문 초록 (Abstract)
A sinusoidal boat tail (SBT) is developed and investigated to greatly reduce drag, side force, and yawing moment under crosswind conditions. The drag and side forces of a heavy vehicle model with the SBT are reduced by 15.9 % and 22.6 %, respectively, relative to those of a reference model without the SBT at a yaw angle of 7°. Therefore, the SBT improves the aerodynamic performance and driving stability of the vehicle model. Flow characteristics around the vehicle model are measured using a particle image velocimetry technique. Mean velocity field results show that the SBT effectively suppresses the formation of longitudinal vortices by enhancing the streamwise velocity of the region behind the boat tail. In addition, the streamwise momentum deficit is reduced in the wake region owing to the development of a secondary recirculating flow region.