Numerical Simulation of the Influence of Additional Aerodynamic Devices on the Aerodynamic Drag of Van-Body Truck

Wang, Dong; Wang, Yansong; Han, Yu; Dang, Yan; Fan, Dengyun; Li, Liguang

doi:10.1007/978-3-662-45043-7_2

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…La geometría del vehículo fue limpiada topológicamente y se verificó la geometría de intersección sin errores, notando así un modelo limpio con superficie de malla ideal. La discretización del dominio fue conjeturada mediante la aplicación de "mallas hibridas" (Wang et al, 2014), de manera que se asociaron características de las mallas estructuradas y no estructuradas, para llenar los dominios sin restricción alguna, y mejora en la precisión de los cálculos viscosos. Son considerados los tamaños de malla entre finas y gruesas de diversas regiones establecidas según el dominio computacional en las diversas partes del tractocamión y remolque según la descripción de la Tabla 1.…”

Section: Energy Equationunclassified

Comportamiento aerodinámico en la reducción del arrastre mediante la variación de accesorios en un tractocamión

Castillo¹,

Tenicota²,

Sevilla³

2020

3C Tecnología

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Section: Energy Equationunclassified

Comportamiento aerodinámico en la reducción del arrastre mediante la variación de accesorios en un tractocamión

Castillo¹,

Tenicota²,

Sevilla³

2020

3C Tecnología

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“…Thus, expanding our knowledge about the effects of various devices on the drag coefficient and the changes are induced on the flow field around the trucks becomes crucial in designing future optimal drag reducing devices. Although experimental data obtained from the wind tunnel are remarkably important, utilization of the numerical methods to simulate the flow field around the vehicles leads to decrease in time cost and number of wind tunnel experiments, extensively [9]. Despite so many advances in the numerical methods, the accurate and valid simulation of flow around the trucks is not simple regarding to the different phenomena in the turbulent flow field as well as the geometric complexities.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of drag reduction in a Class 5 medium duty truck

Norouzi¹,

Pooladi²,

Mahmoudi³

2016

J. MECH. ENG. SCI.

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In the present paper, the three-dimensional numerical investigation of Class 5 medium duty trucks (based on a production of Volvo Company) is carried out. The aim is to investigate and provide additional insights about the drag reduction methods in medium duty trucks. The flow field and pressure distribution around the truck were simulated using the Finite Volume Method. The Simple algorithm was employed to couple the pressure and momentum. A constant velocity of 30 m/s was set in the inlet, the non-slip condition in conjugation with a wall function were used on the truck and ground surfaces, and the pressure-outlet was applied at the outlet. For the turbulent regime, the well-known standard k-ε model was used to simulate the turbulent flow characteristics. The effects of vortexes around the vehicle on the drag coefficient were studied. Also, some passive devices such as standard and large windbreakers, convex roof, and the axial channel were considered for drag reduction at a high velocity (30 m/s) and standard atmospheric conditions (T=25℃, p=1 atm). The results showed that the large windbreakers and covering the gap between the trailer and the container are not suitable successors for standard windbreakers. Furthermore, it was found that the convex roof is a suitable passive or active device for notable drag reduction (25%). Some recommendations for future works might include investigating the effect of combinations of different devices on the drag reduction, studying the different underbody devices like side skirts, and using more sophisticated turbulent models such as large eddy simulation.

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Optimization of wind resistance in commercial vehicles with consideration of sunroof buffeting noise

Lu²,

Tang

et al. 2021

AIP Advances

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The aim of this study was to reduce the aerodynamic resistance coefficient of heavy commercial vehicles and buffeting noise that occurs when a sunroof is opened. Computational fluid dynamics was used to establish a numerical simulation model of wind resistance and buffeting noise. Analysis shows that the main influences on aerodynamic resistance are the airflow impact on the roof dome and the wake vortex behind the cab. Sunroof buffeting noise is caused by a low-pressure turbulent vortex generated at the forehead of the cab and falls off at the sunroof. A strategy for reducing the wind resistance coefficient and sunroof buffeting noise is proposed, which involves optimizing the sun visor installation angle and roof dome shape. The optimal strategy is to increase the sun visor installation angle by 4° and use the Scheme 2 roof dome. After optimization, the aerodynamic resistance coefficient of the commercial vehicle was reduced by 2.07% and the sound pressure level of sunroof buffeting noise was reduced by 18.3 dB. Hence, the effect of optimization was obvious. This work provides guidance for reducing drag and buffeting noise in commercial vehicles.

show abstract

Numerical Simulation of the Influence of Additional Aerodynamic Devices on the Aerodynamic Drag of Van-Body Truck

Cited by 3 publications

References 1 publication

Comportamiento aerodinámico en la reducción del arrastre mediante la variación de accesorios en un tractocamión

Comportamiento aerodinámico en la reducción del arrastre mediante la variación de accesorios en un tractocamión

Numerical investigation of drag reduction in a Class 5 medium duty truck

Optimization of wind resistance in commercial vehicles with consideration of sunroof buffeting noise

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