Influence of Different Plates Arrangements on the Car Body

Kurec, Krzysztof; Kamieniecki, Konrad; Piechna, Janusz

doi:10.3390/en15020619

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…A slightly different approach to the aerodynamics of road vehicles is presented in the work of Kurec et al [6]. The aim of the authors was to analyze the active system that acts as an aerodynamic brake.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Aeroacoustic Phenomena Generated by Heterogeneous Column of Vehicles

Hamiga

Ciesielka

2022

Energies

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The last decade has seen an exponential interest in conventional and unconventional energy issues. This trend has also extended to road transport issues and is driven by expectations to minimize fuel and/or energy consumption and negative environmental impact. In the global literature, much attention is focused on the work of autonomous transport, both passenger and trucks, and on the phenomena of platooning. The paper presents original aerodynamic and aeroacoustic tests of heterogeneous vehicle columns. In the work, models of a car, a van and a truck were built, followed by heterogeneous columns with different distances between the vehicles. Computational fluid dynamics (CFD) methods and two turbulence models, k−ω shear stress transport (SST) and large eddy simulation (LES), were used in this study. The study enabled the determination of drag coefficients and lift force. Application of the Ffowcs Williams–Hawkings (FW-H) analogy allowed for the determination of the distributions of sound pressure levels generated by moving vehicles and columns of vehicles. In order to verify the developed models, acoustic field measurements were made for the following passages: passenger car, van, and truck. Acoustic pressure level and A-weighted sound level (SPL) were measured in Krakow and in its vicinity. Research has shown that grouping vehicles into optimal columns and maintaining distances between vehicles using modern control systems can result in significant energy savings and reduce harmful emissions to the environment.

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Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Aeroacoustic Phenomena Generated by Heterogeneous Column of Vehicles

Hamiga

Ciesielka

2022

Energies

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“…However, few have examined the plate and shell structure. In other fields of engineering machinery, such as the aerospace [4], marine [5] and automotive [6] industries, the study of the vibration mechanism of plate and shell structures on machinery has been extended to various aspects and has been quite in-depth. As the application of plate and shell structures is more and more extensive, several scholars have begun to research the vibration of plate and shell structure, such as the free vibration characteristics of composite shells [7], the vibration analysis of rectangular plate coupling [8], the vibration characteristics of cylindrical shells with internal structure [9] and so on.…”

Section: Introductionmentioning

confidence: 99%

Vibration Response of Metal Plate and Shell Structure under Multi-Source Excitation with Welding and Bolt Connection

Ding,

Tang,

Zhang

et al. 2024

Agriculture

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There are many excitation sources and complex vibration environments in combine harvesters. The coupling and superposition of different vibration signals on the plate and shell seriously affect the working parts of the body. This also reduces the reliability of the whole machine. At present, domestic and foreign research on existing harvesters mainly focuses on harvesting performance, with less research on vibration characteristics. Therefore, in this paper, the vibration response of the metal plate–shell under the two connection modes of bolt connection and welding is studied, in order to optimize the design and structure of the plate–shell structure of the combine harvester and improve the overall performance. First, the welded and bolted plates are numerically modeled using Hypermesh pre-processing functions. Then, the boundary conditions are simulated by continuous variable stiffness elastic constraint experiments. Finally, the intrinsic vibration dynamic model of the four-sided simply supported plate and four-sided solidly supported plate is established using the modal superposition method. By analyzing the modal frequencies and vibration patterns, the following results are obtained. The connection method between the plate and the frame has a significant impact on the inherent vibration characteristics of the plate. The bolt connection will make the plate’s intrinsic vibration frequency higher than that of the welding method, but the effect on the plate’s intrinsic vibration pattern is more minor. At the same time, in order to verify the accuracy of the model, the actual modal vibration patterns and frequencies of the same proportion of plates in the modal test are compared with the results of modal vibration patterns and frequencies obtained by Ansys. The errors of the two dynamic model analytical methods are within 1% and 3%, respectively. This result verifies the accuracy of the dynamic model of the metal plate and shell structure under different connection methods.

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Comprehensive CFD Aerodynamic Simulation of a Sport Motorcycle

Wiński

Piechna

2022

Energies

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Nowadays, aerodynamics is a key focal point in the vehicle design process. Beyond its direct impact on the performance of a vehicle, it also has significant effects on economics and safety. In the last decade numerical methods, mainly Computational Fluid Dynamics (CFD), have established themselves as a reliable tool that assists in the design process and complements classical tunnel tests. However, questions remain about the possible obtained accuracy, best practices and applied turbulence models. In this paper, we present a comprehensive study of motorcycle aerodynamics using CFD methods which, compared to the most common car aerodynamics analysis, has many specific features. The motorcycle, along with its rider, constitutes a shape with very complex aerodynamic properties. A detailed insight into the flow features is presented with detailed commentary. The front fairing, the front wheel and its suspension were identified as the main contributors to the aerodynamic drag of the motorcycle and its rider. The influence of rider position was also studied and identified as one of the most important elements when considering motorcycle aerodynamics. An extensive turbulence models study was performed to evaluate the accuracy of the most common Reynolds-averaged Navier–Stokes models and novel hybrid models, such as the Scale Adaptive Simulation and the Delayed Detached Eddy Simulation. Similar values of drag coefficients were obtained for different turbulence models with noticeable differences found for k−ϵ models. It was also observed that near-wall treatment affects the flow behaviour near the wheels and windshield but has no impact on the global aerodynamic parameters. In the summary, a discussion about the obtained results was set forth and a number of questions related to specifics of motorcycle CFD simulations were addressed.

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Influence of Different Plates Arrangements on the Car Body

Cited by 4 publications

References 15 publications

Numerical Analysis of Aeroacoustic Phenomena Generated by Heterogeneous Column of Vehicles

Numerical Analysis of Aeroacoustic Phenomena Generated by Heterogeneous Column of Vehicles

Vibration Response of Metal Plate and Shell Structure under Multi-Source Excitation with Welding and Bolt Connection

Comprehensive CFD Aerodynamic Simulation of a Sport Motorcycle

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