Aerodynamic optimization of the body of a bus

Arteaga, Oscar; Hernán, Morales V.; Terán, Héctor C.; Chacon, Sonia; Lara, Mario A; Rocha-Hoyos, Juan Carlos; Argüello, Eacute;dison; Aguirre, R.

doi:10.1088/1757-899x/872/1/012002

Cited by 2 publications

(2 citation statements)

References 1 publication

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“…Oscar et al [8] conducted research aimed at the aerodynamic study of bus bodywork with computational fluid dynamics (CFD) software and through a wind tunnel in order to validate the results obtained in the virtual software. Different geometries of the bodywork were evaluated by printing 3D prototypes on a scale of 1:200, which resulted in a body formed by two spoilers, another one with a front deflector and a final one with the original body, presenting the second option of a higher lift coefficient with the reduction of turbulence zones and an optimum drag coefficient according to the INEN 1323-2009 standards.…”

Section: Introductionmentioning

confidence: 99%

Investigating the aerodynamic effect of rooftop cargo compartment – a case of modified intercity bus

Tefera,

Bekele,

Pandey

2023

Eng. Res. Express

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Buses are one mode of mass transportation but they are inefficient in terms of fuel consumption and ergonomically poor when loaded. Thus to decrease the fuel consumption, an improvement on the aerodynamic shape of the bus is required. This paper mainly focused on locally modified ISUZU buses which are serving as an intercity bus in Ethiopia. These buses are inefficient in terms of fuel consumption because of their body design and other add-on devices. One of the add-on devices which spoil the aerodynamic profile of this bus is the luggage loaded on the roof rack. Therefore, in this paper aerodynamically efficient rooftop luggage compartment is designed for these buses. The performance test is carried out for a scaled-down ISUZU bus model numerically using ANSYS Fluent CFD software and experimentally using wind tunnel testing. The numerical results are validated by an experimental test which is carried out using HM 170 open wind tunnel set-up. According to the numerical result, the modified bus reduced the drag coefficient by 34%, 34.5% and 34%, when compared to the clean roof baseline bus, the baseline bus with roof rack and the loaded baseline bus respectively. Similarly, the drag force is reduced by 12%, 14% and 32% respectively. In addition, the fuel consumption is reduced by 2.15 l h −1, 4.17 l h −1 and 7.24 l h −1 respectively. It is also found that the numerical results are in good agreement with the experimental results. Overall, the modified bus is found to be more fuel saving and ergonomically better design.

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Section: Introductionmentioning

confidence: 99%

Investigating the aerodynamic effect of rooftop cargo compartment – a case of modified intercity bus

Tefera,

Bekele,

Pandey

2023

Eng. Res. Express

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“…Some studies to investigate the aerodynamic behavior on different driving conditions of large vehicles such as a bus, truck, and trailer have been conducted to study, optimize and experimentally test the aerodynamic characteristics of the vehicle [11][12][13][14][15]. There are also numerous existing numerical and experimental research to investigate the effect of crosswind on a double-deck bus, moving vehicle under crosswind, vulnerability assessment of crosswind and even on passenger trains [16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Characteristics of Overtaking Bus under Crosswind: CFD Investigation

Yudianto

Sofyan

Gunadi

et al. 2022

CFDL

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The presence of other vehicles, travelling together on the road, highly contributes to the condition on the realistic air flow direction. The position alteration of other vehicles generates different airflow direction which is unpredictable experienced by the vehicle under investigation. It considerably affects the stability of a vehicle having large size of the body. The purpose of the study was to investigate the aerodynamic response of a detailed bus model in overtaking process with the interference of crosswind. Fluidic simulation was performed to investigate the air flow behavior imposed on the bus by means of Computational Fluid Dynamics (CFD) analysis. A scaled bus model was used in the simulation with the different positions representing the buses during the overtaking process. The coefficient X/L was introduced to realize the vehicle position during the overtaking process. The results discussed the alteration of drag force coefficient, lift force coefficient, side force coefficient, during the position on overtaking process. The resulting turbulence kinetic energy around the bus was also discussed by comparing the case without crosswind and when the yaw angle was 30°. The most prominent aerodynamic forces alteration occurs when the overtaking process was at X/L=1. Further explanation about the pressure coefficient at the surface of the bus and the area around the vehicle was investigated at this position. The accuracy of numerical results calculation was verified by comparing the result of simulation and experimental testing of Cd and Cl with the percentage of deviation 0.37% and 2.90% respectively.

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Aerodynamic optimization of the body of a bus

Cited by 2 publications

References 1 publication

Investigating the aerodynamic effect of rooftop cargo compartment – a case of modified intercity bus

Investigating the aerodynamic effect of rooftop cargo compartment – a case of modified intercity bus

Aerodynamic Characteristics of Overtaking Bus under Crosswind: CFD Investigation

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