Design and analysis of an active underbody aerodynamic device for tractor trailers

At highway speeds, up to 65 % of the total energy used by large trucks is for overcoming aerodynamic drag. The underbody region of a tractor-trailer is responsible for up to 30 % of the aerodynamic drag on tractor-trailers, which is the highest drag created by any region on the vehicle. In this study, a novel concept of an active underbody drag reduction device is developed and investigated. The device was evaluated and optimized using computational fluid dynamics (CFD) techniques. It successfully decreased the drag coefficient of the tractor-trailer model by 4.1 %. Additionally, the device eliminated the underbody recirculation region and reduced the negative adverse pressure in the wake. A novel mechanism is also developed to allow for the active deployment of the device to mitigate some operational issues such as roadway protrusions, parasitic drag at low speeds, snow and dirt accumulation.

Name thesis:degree_name

Master of Applied Science (MASc)

Discipline thesis:degree_discipline

Automotive Engineering

Grantor

University of Ontario Institute of Technology

Year dc:date.issued

2018

Author dc:creator

• Ibrahim, Mohamed

Advisor dc:contributor.advisor

• Agelin-Chaab, Martin

• CFD
• Aerodynamics
• Tractor-trailer
• Underbody device
• Drag reduction

Language dc:language.iso

en

Handle dc:identifier.uri

https://hdl.handle.net/10155/929

OAI identifier oai:identifier

oai:ontariotechu.scholaris.ca:10155/929