Aerodynamic Study on a Heavy Truck Passing by a Bridge Pylon under Crosswinds Using CFD

Salati, Luigi; Schito, Paolo; Rocchi, Daniele; Sabbioni, Edoardo

doi:10.1061/(asce)be.1943-5592.0001277

Cited by 26 publications

(17 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additional details about the governing equations can be found in the reference (Yakhot & Orszag, 1986). Generally, to enable the motion of the vehicles, the dynamic mesh technology is often employed (Salati et al, 2018). For the dynamic mesh model, the mesh is adjusted according to the movement of the region boundaries, and the mesh is automatically updated according to the position of the boundaries.…”

Section: Governing Equations For Aerodynamic Load Computationmentioning

confidence: 99%

“…Therefore, a suitable time step must be selected to ensure the quality of the updated grid. In similar studies, the time step of the simulation is usually between 0.0002s and 0.005s (Clarke & Filippone, 2007;Liu et al, 2018;Salati et al, 2018). The grid is updated at each time step, thus a smaller time step will greatly increase the computation time, and the grid will have a large displacement in a long time step, which will increase the difficulty of re-meshing or even cause the failure of re-meshing.…”

Section: Computational Setup For Aerodynamicsmentioning

confidence: 99%

See 1 more Smart Citation

Coupling analysis of transient aerodynamic and dynamic response of cars in overtaking under crosswinds

Zhang

et al. 2020

Engineering Applications of Computational Fluid Mechanics

View full text Add to dashboard Cite

The aerodynamic performance and dynamic response of two cars in overtaking maneuver under crosswind were investigated using a multi-car two-way coupling method. The coupling was achieved by exchanging aerodynamic forces obtained by computational fluid dynamic and vehicle dynamic responses acquired by multi-body dynamics in real time. The change rules of the aerodynamic force, moment, yaw angle, and lateral displacement of overtaking and overtaken cars were revealed on the basis of coupling computation. The coupling effect between aerodynamics and dynamics and the interplay between overtaking and overtaken cars were also illustrated. Moreover, the necessity of the two-way coupling was verified. Final results indicated that the posture of the body and the lateral space of the two vehicles are crucial to the stability of the vehicles during the overtaking maneuver, and the interaction between the aerodynamic forces and the dynamic response should be considered.

show abstract

Section: Governing Equations For Aerodynamic Load Computationmentioning

confidence: 99%

Section: Computational Setup For Aerodynamicsmentioning

confidence: 99%

Coupling analysis of transient aerodynamic and dynamic response of cars in overtaking under crosswinds

Zhang

et al. 2020

Engineering Applications of Computational Fluid Mechanics

View full text Add to dashboard Cite

show abstract

“…On the top corner of the trailer, the flow separates generating high turbulence responsible of the previously mentioned change in the aerodynamic forces. In Figure 1-1, it is showed the pressure distribution over the heavy truck surface for a yaw angle, the angle between the wind direction and vehicle speed, of 30 ° computed in previous author's work [10] . MacArthur et al [11], showed that the stream-wise vortex separated off the roof of the trailer is separated from the bulk velocity wake and affects the crosswind stability.…”

Section: Introductionmentioning

confidence: 99%

“…They must be customized and tailed on the specific infrastructure for which they are designed, since it must account for dynamic coupling of aerodynamic loads (depending on the infrastructure layout) and vehicle-driver response. author's work [10].…”

Section: Introductionmentioning

confidence: 99%

Strategies to reduce the risk of side wind induced accident on heavy truck

Salati

Schito

Cheli

2019

Journal of Fluids and Structures

Self Cite

View full text Add to dashboard Cite

Vehicles, in particular high-sided lorries and trucks, can be at risk of wind-induced accidents such as overturning and/or side slip, especially on exposed sites such as embankments, viaducts and bridges. A first solution, lies in designing fences and a lateral shield to be placed both at the edges of the bridge and close to the tower, thereby shielding the vehicle from crosswind. Nevertheless, it is also possible to optimize the aerodynamic response of the vehicle. In this work, several strategies were used and compared to optimized the aerodynamic response of the Heavy Good Vehicle (HGV) in crosswind: changing of the shape of the trailer, vortex Generators (VGs) installed on the leading edge of the trailer and passive devices installed along the sides/top of the trailer. Front-rear trailer devices, previously designed and patented by the author, positioned on the sides of the trailer reduced the overturning moment by about 8 %. Steady state and time variant CFD simulations were used. The numerical models were validated with wind tunnel test.

show abstract

“…Charuvisit et al [19] studied the wind distribution at a specific height above a bridge deck behind different towers with wind barriers and found that the shape and size of the tower can affect the wind field behind the tower. Many researchers have investigated the sheltering effect of bridge towers mainly for vehicles [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Wind Tunnel Test on Local Wind Field around the Bridge Tower of a Truss Girder

Zhang

Huang³

et al. 2021

Advances in Civil Engineering

View full text Add to dashboard Cite

The aerodynamic performance of vehicles on a bridge deck depends on the local wind field, especially in a region near a bridge tower. This study was carried out on a large-scale (1: 20.4) truss girder, and wind tunnel tests were performed to determine how the wind fields were affected by the bridge tower in the presence of different wind barriers. The wind barrier parameters significantly affect the wind field. Wind barriers should be sufficiently high to provide a wide protection range and have relatively small porosities to reduce the wind speed. The opening form of the wind barrier should also be considered, where a circular-holed form reduces the wind speed and turbulence more than a horizontal-slatted form. The wind field is affected by structures and bridge towers on the deck. A turning point in the wind speed occurs at a measurement point near the bridge tower, and this point gradually moves upward towards lanes on the leeward side of the bridge. The equivalent wind speed is significantly reduced over a four-meter height range because of shadowing from the bridge tower and the wind barrier.

show abstract

Aerodynamic Study on a Heavy Truck Passing by a Bridge Pylon under Crosswinds Using CFD

Cited by 26 publications

References 21 publications

Coupling analysis of transient aerodynamic and dynamic response of cars in overtaking under crosswinds

Coupling analysis of transient aerodynamic and dynamic response of cars in overtaking under crosswinds

Strategies to reduce the risk of side wind induced accident on heavy truck

Wind Tunnel Test on Local Wind Field around the Bridge Tower of a Truss Girder

Contact Info

Product

Resources

About