Numerical investigation on aerodynamic performance and stability of a sedan under wind–bridge–tunnel road condition

Zhang, Qianwen; Su, Chuqi

doi:10.1016/j.aej.2020.07.004

Cited by 22 publications

(6 citation statements)

References 31 publications

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“…However, very little research has been done on simulating the aerodynamic behaviour of vehicles passing by bridge towers, which has the potential to improve our understanding of vehicle stability and safety on bridges in high winds. Huang et al (2023) investigated the aerodynamic stability of cars passing through the wake region of a bridge tower at high speed under different road adhesion and crosswind conditions. Results from simulations indicated that lower values of road adhesion coefficient translated into significant deflections and deviations of the vehicle which led to significant change in flow field around the vehicle.…”

Section: Introductionmentioning

confidence: 99%

Full-scale aerodynamic study on the effects of tower wind shields and road-sign gantries on passing high-sided vehicles in the tower region at the Queensferry Crossing

Zhu,

McCrum,

Keenahan

2024

Advances in Structural Engineering

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A novel investigation into the impact of the tower road-sign gantry and the tower shielding on double-decker buses and trucks passing by the bridge tower based on a previously validated full-scale CFD model. Two sets of simulations were conducted for comparison of aerodynamic force conditions of vehicles as they pass by the bridge tower: first group of simulations were performed including and excluding the road-sign gantry; and the second group include and exclude the tower shielding. Conditions in different traffic lanes (one on leeward side and two on windward side) considered. The effect of changes in wind yaw angle are also considered. Mechanism exploration on the variation of vehicle aerodynamic force conditions was made based on the numerical visualization of wind velocity field and pressure field. Novel results suggest that the road-sign gantry provides a sheltering effect in some circumstances, but a destabilizing effect in others. In addition, the tower shielding shows significant impact on reducing aerodynamic forces and sudden force changes of the high-sided vehicles while they are passing by the bridge tower.

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Section: Introductionmentioning

confidence: 99%

Full-scale aerodynamic study on the effects of tower wind shields and road-sign gantries on passing high-sided vehicles in the tower region at the Queensferry Crossing

Zhu,

McCrum,

Keenahan

2024

Advances in Structural Engineering

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“…With the considerable improvement of the economy, vehicles have become the main mode of transport, highlighting the importance of driving stability as a key factor in vehicle safety evaluation (Ashton et al , 2016). During driving, body rolling, pitching or yawing can cause transient changes in aerodynamic loads and flow fields around the vehicle, which can significantly affect its stability (Zhang et al , 2020; Wang, 2021). Vehicle rollovers can have serious consequences that threaten road safety, personal life and property safety.…”

Section: Introductionmentioning

confidence: 99%

The influence of vehicle body roll motion on aerodynamic characteristics under crosswind condition

Taiming,

Ma,

Zhang

et al. 2023

HFF

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Purpose The purpose of this study is investigate the transient aerodynamic characteristics of high-speed vehicle with body roll motion under crosswind condition to improve aerodynamic stability. Design/methodology/approach An overset mesh was used to simulate the rolling motion of the vehicle body. A wind tunnel experiment was conducted to validate the numerical method. Findings The results revealed that the vehicle’s aerodynamic characteristics changed periodically with the body’s periodic motion. In the absence of crosswind, the pressure distribution on the left and right sides of the vehicle body was symmetrical, and the speed streamline flowed to the rear of the vehicle in an orderly manner. The maximum aerodynamic lift observed in the transient simulation was −0.089, which is approximately 0.70 times that of the quasi-static simulation experiment. In addition, the maximum aerodynamic side force observed in the transient simulation was 0.654, which is approximately 1.25 times that of the quasi-static simulation experiment. Originality/value The aerodynamic load varies periodically with the vehicle body’s cyclic motion. However, the extreme values of the aerodynamic load do not occur when the vehicle body is at its highest or lowest position. This phenomenon is primarily attributed to the mutual interference of airflow viscosity and the hysteresis effect in the flow field, leading to the formation of a substantial vortex near the wheel. Consequently, the aerodynamic coefficient at each horizontal position becomes inconsistent during the periodic rolling of the vehicle body.

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“…This type of system is widely used for data acquisition in real time, and it allows the wireless transfer of information, with the advantage that the user can be at a safe distance from the place where the tests are performed in order to obtain the data. This allows the acquisition of data from tests performed in high-risk areas or that require remaining exposed all the time, as in the measurement of environmental conditions that affect the harvest in a crop, the explosion of a car to measure the forces involved, or inside a wind tunnel to characterize the aerodynamic behavior of an object (11)(12)(13)(14)(15)(16)(17)(18).…”

Section: Introductionmentioning

confidence: 99%

Wireless Real-Time Data Acquisition System for Aerodynamic Characterization of a Wind Turbine

Casallas

Parra-Peñuela²,

Gaona³

2023

Ing.

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Context: Wind energy sources utilize renewable, free, and environmentally friendly resources, so there are projects focused on the design of wind turbines to increase their efficiency. Simulations using computational fluid dynamics techniques allow designs to be analyzed. which, are then validated through experimentation and wind tunnel measurements. Method: Data acquisition is performed by using Wind Sensor Rev.P sensors to measure wind velocity, and MMA7361 accelerometer to measure the vibrations generated by the wind in the turbine. Additionally, an ESP32 is required to process and transmit the data via Bluetooth, thus facilitating the installation of the real-time monitoring module inside the wind tunnel. Results: A monitoring module with a sampling rate of 5 ms was obtained, thus allowing real-time data acquisition, with a resolution of 12 bits for good data capturing accuracy and a transmission rate of approximately 74000 bps. An application capable of plotting 3D acceleration and 2D wind speed signals was also created. Conclusions: The device developed serves as a support for future wind turbine design projects since it is wireless, its installation is simple, it facilitates data collection inside a wind tunnel, and it allows visualizing the turbine’s behavior in real time by means of a graphic interface.

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Numerical investigation on aerodynamic performance and stability of a sedan under wind–bridge–tunnel road condition

Cited by 22 publications

References 31 publications

Full-scale aerodynamic study on the effects of tower wind shields and road-sign gantries on passing high-sided vehicles in the tower region at the Queensferry Crossing

Full-scale aerodynamic study on the effects of tower wind shields and road-sign gantries on passing high-sided vehicles in the tower region at the Queensferry Crossing

The influence of vehicle body roll motion on aerodynamic characteristics under crosswind condition

Wireless Real-Time Data Acquisition System for Aerodynamic Characterization of a Wind Turbine

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