Computational Investigation of Aerodynamic Characteristics and Drag Reduction of a Bus Model

Mohamed, Eyad Amen; Radhwi, Muhammad N.; AbdelGawad, Ahmed Farouk

doi:10.11648/j.ajae.s.2015020101.16

Cited by 13 publications

(4 citation statements)

References 5 publications

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“…In this study, the relationship between fuel consumption and drag force is examined using CFDsimulated pressure differentials and wind speeds. The total drag force (𝐷 𝑡 ) is defined as the sum of pressure drag (𝐷 𝑃 ) and friction drag (𝐷 𝑓 ) [45]. Initially, the pressure drag force is computed as…”

Section: Drag Calculationsmentioning

confidence: 99%

Impact of Platooning on Fuel Consumption in Heavy-Duty Vehicles: A Computational Fluid Dynamics Modeling Approach

Kim,

Kang,

Hwang

et al. 2024

Preprint

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Platooning represents a crucial strategy for mitigating emissions from heavy-duty vehicles (HDVs). This study evaluates the effects of platoon composition on the surrounding airflow utilizing a computational fluid dynamics (CFD) model, and quantifies the resultant fuel efficiency and CO2 emissions. This study examines fuel consumption data reconstructed from field experiments to validate the CFD model’s ability to accurately simulate drag forces within a homogeneous three-truck platoon. The potential for fuel savings was assessed based on CFD-simulated fuel consumption, taking into account various inter-vehicle distances and driving speeds. The model successfully reproduced the fuel consumption observed in a platooning formation comprising lead, middle, and trailing trucks, with an error margin below 6.2%. While the lead and middle trucks exhibited increased fuel consumption with greater inter-vehicle distances, the trailing truck showed decreased fuel consumption with specific distance-to-length ratios (D/L), followed by an increase from a D/L of 1.1. Additionally, a significant decrease in total fuel efficiency was noted for D/L ratios exceeding 1.5. Considering the diverse platooning scenarios analyzed, the study anticipates an annual reduction of up to 7 tons of CO2 equivalent per vehicle. By optimizing platooning configurations, this research contributes to enhancing fuel efficiency and reducing emissions from HDVs.

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Section: Drag Calculationsmentioning

confidence: 99%

Impact of Platooning on Fuel Consumption in Heavy-Duty Vehicles: A Computational Fluid Dynamics Modeling Approach

Kim,

Kang,

Hwang

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…However, their large size and shape create significant aerodynamic drag, hindering their speed capabilities [5]. Analyzing buses' aerodynamic performance under various airflow conditions using Computational Fluid Dynamics (CFD) simulations provides deeper insights into the factors affecting bus aerodynamics [6]. This understanding can lead to design improvements that enhance bus efficiency, safety, and performance, ultimately contributing to better public transportation systems.…”

Section: Introductionmentioning

confidence: 99%

Airflow Analysis of the Bus Under Various Velocities Using CFD Simulation

Muhammad Aiman Hakim Samsuddin

2024

ASET

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This project investigated the aerodynamic effects of various airflow velocities around a bus. Key parameters included airflow velocity and turbulence models, with dependent variables being the velocity and pressure on the bus body. The bus model, sourced from an existing GrabCAD file, was imported into SimFlow 4.0 for analysis. A steady-state simulation was employed, incorporating symmetry conditions, turbulence modeling, boundary conditions, and a baseline post-processing method to visualize the velocity and pressure distributions around the bus. Mesh refinement was carefully adjusted to accommodate the bus's large size and accurately capture the flow gradients. The simulation results were analyzed using Paraview post-processing to evaluate the final velocity and pressure contours. The results showed that the airflow velocities crucially affect the velocity and pressure distribution around the bus. This study yielded significant and insightful results by varying the independent parameters, advancing the understanding of bus aerodynamics under different airflow velocities.

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“…By modifying the truck geometry, solving with k-ε turbulence model, it was shown that estimated fuel savings were nearly 35% [9]. The possibility of drag reduction in buses was studied and it was found that reduction in aerodynamic drag up to 14% could be reached, which resulted in 8.4% reduction in fuel consumption by slight modi cations in the shape [10]. In another bus model, a comparison with the worst design is made and the drag coe cient is reduced from 0.8782 to 0.3872 by using a curved surface in front [11].…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Design of Buses Inspired by Beluga Whales

Arabacı

Pakdemi̇rli̇

2022

Preprint

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New bus designs inspired by the perfect streamlined body shapes of beluga whales are presented. The bodies are drawn using the UNIGRAPHICS program. The drag forces and the drag coefficients of variants of the new bus models are determined both experimentally and numerically. For numerical computations, the drawings are inserted into the ANSYS CFD program for meshing. The drag forces and the drag coefficients corresponding to the various designs are then computed using the FLUENT (solver) and the CFX (result) program. The experimental determination of the drag forces and the drag coefficients are performed in a wind tunnel test. Both numerical and experimental analysis reveals that substantial reductions in drag forces and drag coefficients are possible using the beluga whale inspired buses. Due to the reduced drag, lower fuel consumptions are expected for the new designs.

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Computational Investigation of Aerodynamic Characteristics and Drag Reduction of a Bus Model

Cited by 13 publications

References 5 publications

Impact of Platooning on Fuel Consumption in Heavy-Duty Vehicles: A Computational Fluid Dynamics Modeling Approach

Impact of Platooning on Fuel Consumption in Heavy-Duty Vehicles: A Computational Fluid Dynamics Modeling Approach

Airflow Analysis of the Bus Under Various Velocities Using CFD Simulation

Aerodynamic Design of Buses Inspired by Beluga Whales

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