Aerodynamic Drag Reduction of Intercity Buses

McDonald, Alan; Palmer, George M.

doi:10.4271/801404

Cited by 8 publications

(3 citation statements)

References 5 publications

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“…5) in order to capture the boundary layers properly. Table 1 shows a grid independence study and the model's validation against literature for the bus drag coefficient [23]. The axial velocity examined for the results is perpendicular to grilles.…”

Section: Bus Model (Cfd #1)mentioning

confidence: 99%

Multifidelity simulation of underhood thermal system for a bus engine

Karamanos

Afrasiabian

Kim

et al. 2022

Applied Thermal Engineering

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Section: Bus Model (Cfd #1)mentioning

confidence: 99%

Multifidelity simulation of underhood thermal system for a bus engine

Karamanos

Afrasiabian

Kim

et al. 2022

Applied Thermal Engineering

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“…In this context, vehicle aerodynamics is a field of research that has received considerable attention to reduce drag and thus, decrease fuel consumption. 1–4 In heavy vehicles, for example, aerodynamic drag can account for up to 80% of total motion resistance, which might be a great source of improvement. 5 Indeed, the fuel consumption of heavy vehicles has already been decreased by 3%–4% when aerodynamic drag was reduced by around 10%.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, this paper aims at elucidating some flow features over a commercial bus and to assess some potential alternatives of drag reduction devices. Moreover, only studies performed many years ago served as a starting point for this research, for instance, McDonald and Palmer 1 conducted wind tunnel tests to assess and select possible devices to reduce the drag coefficient on buses. Two kinds of vehicles were analyzed using front add-on modifications at several yawed conditions, obtaining drag reductions up to 19%.…”

Section: Introductionmentioning

confidence: 99%

Drag reduction of a commercial bus with add-on aerodynamic devices

Ribeiro

Bravo-Mosquera

Ayala-Zuluaga

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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In the automotive industry, the implementation of drag reduction systems has provided considerable decreases in fuel consumption. These outcomes are in line with the increasing demands of the environmental regulations and consumers’ requirements. Although some studies explain how aerodynamic devices reduce the aerodynamic drag on light and heavy vehicles such as Ahmed bodies and trucks, buses have received almost no attention. For this reason, the flow over the Marcopolo Paradiso 1200 G7 commercial bus and the influence of several aerodynamic devices on the drag force and fuel consumption of the bus are discussed in this article. Three distinct devices (vortex generators, lateral devices, and rails) were proposed after flow visualization tests on the baseline bus. Thus, the entire evaluation consisted of 11 arrangements by combining the three aerodynamic devices. The changes in drag due to all arrangements are estimated using wind tunnel tests, which are validated using Computational Fluid Dynamics simulations. The fuel consumption is evaluated in a simplified long-haul driving cycle between two cities. The devices were able to alter the flow behavior on the bus, resulting in a maximum decrease of 8.63% in the drag coefficient and 3.92% in fuel consumption. Given that the devices used are just first prototypes, we estimate that greater reductions can be achieved with optimized systems. Likewise, this paper probably leads to real applications in other commercial buses due to the evident drag reductions.

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Bus drag reduction by the trapped vortex concept for a single bus and two buses in tandem

Fletcher

Stewart

1986

Journal of Wind Engineering and Industrial Aerodynamics

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Aerodynamic Drag Reduction of Intercity Buses

Cited by 8 publications

References 5 publications

Multifidelity simulation of underhood thermal system for a bus engine

Multifidelity simulation of underhood thermal system for a bus engine

Drag reduction of a commercial bus with add-on aerodynamic devices

Bus drag reduction by the trapped vortex concept for a single bus and two buses in tandem

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