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Drag Reduction of Bluff-Based Body by Wake Control Vanes (Effective Utilization of Under Floor Flow)
Technical Paper
2000-05-0257
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English
Abstract
Heavy aerodynamic drag of ~70% among all drags is imposed on large bluff-based vehicles like buses and container trucks traveling at high speed. To reduce the drag, wake control experiments are performed with attention to effective utilization of under floor flow by using air guide vanes equipped at the based rear end corners. The aerodynamic drag is measured for a 1/16 bus model settled on the moving ground of a wind tunnel. The flow patterns controlled by the vanes are visualized by oil film and smoke tracer techniques. As a result, drag reduction of ~16% is successfully attained by optimizing the vane profile and position, in which the under floor flow is effectively induced by the under vane into the wake resulting in remarkable recovery of the negative pressure acting on the based end surface.
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Authors
- Yohei Takemori - 1),2),4),5) Mie University, 1515 Kamihama-cho Tsu, Mie, Japan 3) Honda Motor Co, Ltd., Tochigi, Japan
- Seizo Kato - 1),2),4),5) Mie University, 1515 Kamihama-cho Tsu, Mie, Japan 3) Honda Motor Co, Ltd., Tochigi, Japan
- Yasutaka Masumitsu - 1),2),4),5) Mie University, 1515 Kamihama-cho Tsu, Mie, Japan 3) Honda Motor Co, Ltd., Tochigi, Japan
- Yasuhiro Kaya - 1),2),4),5) Mie University, 1515 Kamihama-cho Tsu, Mie, Japan 3) Honda Motor Co, Ltd., Tochigi, Japan
- Takashi Mizutani - 1),2),4),5) Mie University, 1515 Kamihama-cho Tsu, Mie, Japan 3) Honda Motor Co, Ltd., Tochigi, Japan
Citation
Takemori, Y., Kato, S., Masumitsu, Y., Kaya, Y. et al., "Drag Reduction of Bluff-Based Body by Wake Control Vanes (Effective Utilization of Under Floor Flow)," SAE Technical Paper 2000-05-0257, 2000.Also In
References
- Sovran Gino Mordel Thomas Manson William T. Jr. 1978 AERODYNAMIC DRAG MECHANISMS OF BLUFF BODIES AND ROAD VEHICLES 69 77
- Hucho W-H. 1987 Aerodynamics of Road Vehicles Butterworths
- Kato Seizo Tetsuo Fujimoto and Hirosumi Watanabe 1985 The study for wake control by guide vane for drag reduction, Paper of JSAE 31 64
- Masumitsu Yasutaka 1998 Aero dynamic drag reduction by wake control of 3rd dimensional bluff based body Master thesis of Mie university