Bibliografías temáticas / Motor vehicles Drag (Aerodynamics)

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Literatura académica sobre el tema "Motor vehicles Drag (Aerodynamics)"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 1 de febrero de 2022

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Artículos de revistas sobre el tema "Motor vehicles Drag (Aerodynamics)"

Zhang, Yingchao, Ruidong Wang, Chao Yang, Zijie Wang y Zhe Zhang. "Experimental investigation on wake flow structures of Motor Industry Research Association square-back model". Advances in Mechanical Engineering 12, n.º 6 (junio de 2020): 168781402093231. http://dx.doi.org/10.1177/1687814020932313.

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Since the oil crisis of the last century, drag reduction for vehicles has become the focus of researchers. Currently the world’s major car brands have to seize the sport utility vehicle market. However, the sport utility vehicle models usually have a larger frontal area which brings challenges to drag reduction. This requires a better understanding of flow around sport utility vehicle models. The Motor Industry Research Association square-back vehicle model is similar to the sport utility vehicle geometry and can reflect the typical characteristics of aerodynamics of sport utility vehicle models. In this article, the wake flow structures of a 1/8 Motor Industry Research Association model is measured by particle image velocimetry. The results indicate that there is an obviously “n” type backflow vortex behind the vehicle. In the vertical direction, the vortex rotates from the outside to the inside, meanwhile the vortex rotates from the inside to the outside in the longitudinal direction. There is a velocity deficit region between the vortex and the back of the model which is an important source of drag force. This article summarizes the results of particle image velocimetry measurements from the model tests and obtains a picture of the structures of the wake vortex finally which can provide a theoretical basis for the drag reduction research in the future.

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WYCZALEK, FLOYD A. "ULTRA LIGHT ELECTRIC VEHICLES (EV)". Journal of Circuits, Systems and Computers 05, n.º 01 (marzo de 1995): 81–91. http://dx.doi.org/10.1142/s0218126695000072.

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While this project reviewed the status of EV propulsion worldwide, and included European, American, and Japanese electric vehicles and the new Zebra sodium nickel chloride battery introduced by AEG of Daimler Benz at the September 1993 Frankfurt IAA motor show, and the November 1993 Tokyo motor show, this paper is limited in scope to showing results of a mathematical comparison which permits comparative assessment of 1993 EV automotive acceleration performance and the effects of vehicle configuration on the aerodynamic skin friction component of the total aerodynamic drag coefficient. Conclusions are: the major automobile manufacturers have been responsive, creative, and synergistic in developing and demonstrating significant improvements in acceleration performance and vehicle styling configuration strategies which may permit early deployment of ultralight electric vehicles with increased range. Consequently, the battery "Electric Vehicle" now has a brighter future.

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Chen, Zhen, Zhenqqi Gu y Tao Jiang. "Research on transient aerodynamic characteristics of windshield wipers of vehicles". International Journal of Numerical Methods for Heat & Fluid Flow 29, n.º 8 (5 de agosto de 2019): 2870–84. http://dx.doi.org/10.1108/hff-09-2018-0531.

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Purpose The main purpose of this paper is to gain a better understanding of the transient aerodynamic characteristics of moving windshield wipers. In addition, this paper also strives to illustrate and clarify how the wiper motion impacts the airflow structure; the aerodynamic interaction of two wipers is also discussed. Design/methodology/approach A standard vehicle model proposed by the Motor Industry Research Association and a pair of simplified bone wipers are introduced, and a dynamic mesh technique and user-defined functions are used to achieve the wiper motion. Finite volume methods and large eddy simulation (LES) are used to simulate the transient airflow field. The simulation results are validated through the wind tunnel test. Findings The results obtained from the study are presented graphically, and pressure, velocity distributions, airflow structures, aerodynamic drag and lift force are shown. Significant influences of wiper motion on airflow structures are achieved. The maximum value of aerodynamic lift and drag force exists when wipers are rotating and there is a certain change rule. The aerodynamic lift and drag force when wipers are rotating downward is greater than when wipers are rotating upward, and the force when rotating upward is greater than that when steady. The aerodynamic lift and drag forces of the driver-side wiper is greater than those of the passenger-side wiper. Originality/value The LES method in combination with dynamic mesh technique to study the transient aerodynamic characteristics of windshield wipers is relatively new.

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Stabile, Pietro, Federico Ballo, Gianpiero Mastinu y Massimiliano Gobbi. "An Ultra-Efficient Lightweight Electric Vehicle—Power Demand Analysis to Enable Lightweight Construction". Energies 14, n.º 3 (1 de febrero de 2021): 766. http://dx.doi.org/10.3390/en14030766.

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A detailed analysis of the power demand of an ultraefficient lightweight-battery electric vehicle is performed. The aim is to overcome the problem of lightweight electric vehicles that may have a relatively bad environmental impact if their power demand is not extremely reduced. In particular, electric vehicles have a higher environmental impact during the production phase, which should be balanced by a lower impact during the service life by means of a lightweight design. As an example of an ultraefficient electric vehicle, a prototype for the Shell Eco-marathon competition is considered. A “tank-to-wheel” multiphysics model (thermo-electro-mechanical) of the vehicle was developed in “Matlab-Simscape”. The model includes the battery, the DC motors, the motor controller and the vehicle drag forces. A preliminary model validation was performed by considering experimental data acquisitions completed during the 2019 Shell Eco-marathon European competition at the Brooklands Circuit (UK). Numerical simulations are employed to assess the sharing of the energy consumption among the main dissipation sources. From the analysis, we found that the main sources of mechanical dissipation (i.e., rolling resistance, gravitational/inertial force and aerodynamic drag) have the same role in the defining the power consumption of such kind of vehicles. Moreover, the effect of the main vehicle parameters (i.e., mass, aerodynamic coefficient and tire rolling resistance coefficient) on the energy consumption was analyzed through a sensitivity analysis. Results showed a linear correlation between the variation of the parameters and the power demand, with mass exhibiting the highest influence. The results of this study provide fundamental information to address critical decisions for designing new and more efficient lightweight vehicles, as they allow the designer to clearly identify which are the main parameters to keep under control during the design phase and which are the most promising areas of action.

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Kim, Wootaek, Jongchan Noh y Jinwook Lee. "Effects of Vehicle Type and Inter-Vehicle Distance on Aerodynamic Characteristics during Vehicle Platooning". Applied Sciences 11, n.º 9 (30 de abril de 2021): 4096. http://dx.doi.org/10.3390/app11094096.

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Considering the future development in vehicle platooning technology and the multiple models pertaining to complex road environments involving freight cars and general vehicles, the speed and distance of a vehicle model were set as variables in this study. This study aimed at analyzing the effect of currents acting differently using SolidWorks Flow Simulation tool for the vehicle platooning between different models of trucks that are currently being studied actively and sports utility vehicle (SUV) whose market share has been increasing, in order to evaluate the changes in the drag coefficient and their causes. Additionally, purpose-based vehicle (PBV) presented by Hyundai Motor (Ulsan, Korea) during the CES 2020 was considered. In this study, we found that the shape of the rear side of the leading vehicle reduces the drag coefficient of the following vehicle by washing the wake, similar to a spoiler at the rear. The rear side area of the leading vehicle forms a wide range of low pressures, which increases the drag coefficient effect of the following vehicle. The overall height of the leading vehicle also generates a distribution of low pressures above the rear of the vehicle. This reduces the impact of low pressures on the overall height of the following vehicle. The shape of the front of the following vehicle enables the wake of the leading vehicle, which involves low pressures, to inhibit the Bernoulli effect of the following vehicle. Furthermore, the front of the following vehicle continues to be affected by the wake of the leading vehicle, resulting in an increase in the drag coefficient reduction.

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Podrigalo, Mikhail, Volodymyr Krasnokutskyi, Vitaliy Kashkanov, Olexander Tkachenko y Аlexander Yanchik. "Іmprovement of driving-speed properties improvement of the method for selecting the parameters of the motor-transmission unit car". Journal of Mechanical Engineering and Transport 13, n.º 1 (2021): 111–17. http://dx.doi.org/10.31649/2413-4503-2021-13-1-111-117.

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Aerodynamic characteristics have a major impact on the energy efficiency and traction and speed properties of the vehicle. In this article, based on previous studies of the aerodynamic characteristics of various car models, we propose an improved method for selecting engine and transmission parameters at the design stage. The aim of the study is to improve the dynamic properties of the car by improving the method of selecting the main parameters of the engine-transmission unit by refining the calculation of aerodynamic drag. To achieve it, the following tasks must be solved: to specify the method of selecting the maximum effective engine power; to specify a technique of definition of the maximum constructive speed of the car; to develop a technique for selecting gear ratios. The aerodynamic resistance to the movement of the vehicle is determined by the frontal coefficient of the specified resistance, the density of the air, the area of the frontal resistance and the speed of the vehicle. It is known from classical works on the aerodynamics of a car that in the range of vehicle speeds from 20 m / s to 80 m / s, taking the law of squares when assessing the force of air resistance, it is necessary to change the coefficient of frontal aerodynamic drag depending on the speed of the car. However, when carrying out calculations, this coefficient is taken constant, which leads to obtaining large values of the air resistance force at high speeds and lower at low speeds. There are two possible ways to improve the dynamic properties and energy efficiency of the car during its modernization (increasing the maximum design speed of the car by reducing the gear ratio in higher gear; reducing the maximum efficiency of the engine while maintaining the previous gear ratio in higher gear). As a result of the study, the method of selection (maximum effective engine power; maximum design speed of the car; gear ratios) at the design stage of the parameters of the motor-transmission unit of the car has been improved.

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Ilea, L. y D. Iozsa. "Wheels aerodynamics and impact on passenger vehicles drag coefficient". IOP Conference Series: Materials Science and Engineering 444 (29 de noviembre de 2018): 072005. http://dx.doi.org/10.1088/1757-899x/444/7/072005.

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Sharke, Paul. "Smooth Body". Mechanical Engineering 121, n.º 10 (1 de octubre de 1999): 74–77. http://dx.doi.org/10.1115/1.1999-oct-6.

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This article describes features of a car which is General Motors' (GM) technology demonstration entry in the Partnership for a New Generation of Vehicles, the PNGV program. Compared to the EV1, the ultra-efficient two-passenger electric vehicle GM has been selling in California since 1996, the new concept car has 34 fewer counts (0.034) of aerodynamic drag. The engineers needed to establish the vehicle's architecture early, knowing that any mistakes there would be irreversible. They had to evaluate armrest positions and side-window clearance. By wearing its cooling-air intakes on the rear fenders-a benefit that comes with mounting the engine in back—the new shape borrows from sibling EV1's success with low ram air inlet. While the shape investigation was under way, an EV1 test mule aided the concurrent development of features. A full- size model of the technology demonstration shape was ready for wind-tunnel testing by June 1998.

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Kothari, Priyank. "Reduction of Aerodynamic Drag of Heavy Vehicles using CFD". International Journal for Research in Applied Science and Engineering Technology 9, n.º 8 (31 de agosto de 2021): 2670–78. http://dx.doi.org/10.22214/ijraset.2021.37853.

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Abstract: Aerodynamic drag is the force that opposes an object’s motion. When a vehicle no matter the size, is designed to allow air to move fluidly over its body, aerodynamic drag will have less of an impact on its performance and fuel economy. Heavy trucks burn a significant amount of fuel as to overcome the air resistance. More than 50% of an 18-wheeler’s fuel is spent reducing aerodynamic drag on the highways. Keywords: Aerodynamics, Heavy vehicles, ANSYS, Aerodynamic Drag, Fuel efficiency.

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Song, Xiao-wen, Guo-geng Zhang, Yun Wang y Shu-gen Hu. "Use of bionic inspired surfaces for aerodynamic drag reduction on motor vehicle body panels". Journal of Zhejiang University-SCIENCE A 12, n.º 7 (julio de 2011): 543–51. http://dx.doi.org/10.1631/jzus.a1000505.

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Tesis sobre el tema "Motor vehicles Drag (Aerodynamics)"

Esterhuyse, JC. "Aerodynamic drag of a two-dimensional external compression inlet at supersonic speed". Thesis, Cape Technikon, 1997. http://hdl.handle.net/20.500.11838/1297.

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Thesis (DTech (Mechanical engineering))--Cape Technikon, 1997
This study forms the basis from which the aerodynamic drag of a practical supersonic inlet can be predicted. In air-breathing propulsion systems, as used in high performance flight vehicles, the fuel is carried onboard and the oxygen required for combustion is ingested from the ambient atmosphere. The main function of the inlet is to compress the air from supersonic to subsonic conditions with as little flow distortion as possible. When the velocity of the vehicle approaches or exceeds sonic velocity (M = 1,0) a number of considerations apply to the induction system. The reason for this is that the velocity of the ingested air has to be reduced to appreciably less than sonic velocity, typically to M = 0,3. Failure to do so will cause the propulsion system to be inoperative and cause damage. In the process of compressing the air from supersonic to subsonic conditions a drag penalty is paid. The drag characteristics are a function of the external geometry and internal flow control system of the inlet. The problem which was investigated dealt with drag of a specific type of inlet, namely a two-dimensional external compression inlet. This study is directed at formulating definitive relationships which can be used to design functional inlet systems. To this effect the project was carried out over three phases, a theoretical investigation where a fluid-flow analysis was done of the factors influencing drag. The second phase covered a comprehensive experimental study where intensive wind-tunnel tests were conducted for flight Mach numbers of M = 1,8; M = 2,0; M = 2,2; M = 2,3 and M = 2,4. During the third phase a comparison, between the theoretical values and experimental data was done, for validating the predicted aerodynamic drag figures. The following findings are worth recording: • the increase in total drag below the full flow conditions is more severe than predicted due to the contribution of spillage drag; • the range for subcritical mode of operation is smaller than expected due to boundary layer effects. The study has shown that reasonably good correlation could be achieved between the theoretical analysis and empirical test at low subcritical modes of operation. This suggests that the study has achieved its primary objective.

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Esterhuyse, J. C. "Aerodynamic drag of a two-dimensional external compression inlet at supersonic speed /". [S.l. : s.n.], 1997. http://dk.cput.ac.za/cgi/viewcontent.cgi?article=1033&context=td_ctech.

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Orselli, Erdem. "Computation Of Drag Force On Single And Close-following Vehicles". Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12607619/index.pdf.

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In this study, application of computational fluid dynamics to ground vehicle aerodynamics was investigated. Two types of vehicle models namely, Ahmed Body and MIRA Notchback Body and their scaled models were used. A commercial software "
Fluent"
was used and the effects of implementing different turbulence models with wall functions were observed. As a result, an appropriate turbulence model was selected to use in the study. The drag forces, surface pressure distributions and wake formations were investigated in simulation of various test cases available in the literature. The study was extended to simulate the aerodynamics of the vehicles in close-following situation. The results were then compared with available wind tunnel test data.

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Luke, Mark Elden. "Predicting Drag Polars For Micro Air Vehicles". Diss., CLICK HERE for online access, 2003. http://contentdm.lib.byu.edu/ETD/image/etd297.pdf.

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Barker, Brian W. "Effect of Adaptive Tabs on Drag of a Square-Base Bluff Body". DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1295.

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This thesis involves the experimental wind tunnel testing of a 0.127m by 0.127m square-base bluff body to test the effectiveness of trailing edge tabulations to reduce drag in the Cal Poly 0.912m by 1.219 m low-speed wind tunnel. To accomplish this, the boundary layer was first measured on the trailing edge of the model for the three speeds at 10, 20, and 30 m/s, with Re = 8.3e4, 1.6e5 and 2.5e5 respectively, without the tabs. Three different tests were performed to determine the effectiveness of the tabs. These tests included base pressure measurements, total drag force measurements and hotwire velocity fluctuation measurements. These tests were repeated with tabs on the model’s trailing edge at the three different tab heights and without tabs at all three test speeds. The base pressure measurements showed a decrease in average base pressure with the addition of tabs which signifies an increase in drag. The total drag measurements confirmed this by showing that the overall force increases with the addition of the tabs. The hotwire tests further confirm this by showing that the vortex is present for every configuration tested. This thesis showed that the addition of tabs was unsuccessful in reducing the effects of the vortex shedding for a square-base bluff body. The addition of low, medium, and high tabs to the square base of the bluff body all showed an increase in vortex strength and overall drag. Further study is required to determine if drag savings are feasible for tabs all around the square base of the bluff body and at different locations.

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Marchetti, Paul J. "Electric propulsion and controller design for drag-free spacecraft operation in low earth orbit". Link to electronic thesis, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-122006-144358/.

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Littlewood, Rob. "Novel methods of drag reduction for squareback road vehicles". Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12534.

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Road vehicles are still largely a consumer product and as such the styling of a vehicle becomes a significant factor in how commercially successful a vehicle will become. The influence of styling combined with the numerous other factors to consider in a vehicle development programme means that the optimum aerodynamic package is not possible in real world applications. Aerodynamicists are continually looking for more discrete and innovative ways to reduce the drag of a vehicle. The current thesis adds to this work by investigating the influence of active flow control devices on the aerodynamic drag of square back style road vehicles. A number of different types of flow control are reviewed and the performance of synthetic jets and pulsed jets are investigated on a simple 2D cylinder flow case experimentally. A simplified ¼ scale vehicle model is equipped with active flow control actuators and their effects on the body drag investigated. The influence of the global wake size and the smaller scale in-wake structures on vehicle drag is investigated and discussed. Modification of a large vortex structure in the lower half of the wake is found to be a dominant mechanism by which model base pressure can be influenced. The total gains in power available are calculated and the potential for incorporating active flow control devices in current road vehicles is reviewed. Due to practicality limitations the active flow control devices are currently ruled out for implementation on a road vehicle. The knowledge gained about the vehicle model wake flow topology is later used to create drag reductions using a simple and discrete passive device. The passive modifications act to support claims made about the influence of in wake structures on the global base pressures and vehicle drag. The devices are also tested at full scale where modifications to the vehicle body forces were also observed.

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Kim, Yusik. "Wind turbine aerodynamics in freestream turbulence". Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/360372/.

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Topics in wind turbine aerodynamics are reviewed. These include the effect of freestrearn turbulence all the flows over wind turbine blades; dynamic stall phenomenon; and rotational augmentation. The advantages of numerical studies on these topics are highlighted and large-eddy simulation (LES) is selected to overcome the defects for other numerical approaches, e.g. Reynolds Average Navier-Stokes (RANS) , all such applications

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Castillo-Rivera, Salvador. "Advanced modelling of helicopter nonlinear dynamics and aerodynamics". Thesis, City University London, 2014. http://openaccess.city.ac.uk/13169/.

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The work presented here provides a comprehensive dynamic and aerodynamic helicopter model. The possible applications of this work are wide including, control systems applications, reference and trajectory tracking methods implementation amongst others. The model configuration corresponds to a Sikorsky helicopter; a main rotor in perpendicular combination with a tail rotor. Also, a particular model of unmanned aerial vehicle has been modelled as part of collaboration with the La Laguna University (Spain). The modelling tool is VehicleSim, a program that builds rigid body systems, solves the nonlinear equations of motion and generates the time histories of the corresponding state variables of the vehicle under study. VehicleSim is able to provide the linearised equations of motion in a Matlab file and the symbolic state-space model. This is useful when control systems are to be designed. The main rotor model accounts for flap, lag and feather motions for each blade as well as for their nonlinear dynamic coupling. The tail rotor is modelled including the flap-feather coupling via delta three angle. The main and tail rotors' angular velocities are implemented by PID controllers. Main rotor linear and nonlinear equations are derived and validated by comparison with the theory. Main rotor flap and lag degrees of freedom are validated using frequency domain approaches in the absence of external forces. Also, fuselage-main rotor interaction is studied and validated by using modal analysis and root locus methodology. Vibrations originated at the main rotor are simulated and their effects on the fuselage are examined by a Short Time Fourier transformation. The aerodynamic model uses blade element theory on the main-tail rotors. Hover, climb, descent and forward flight conditions are simulated and they allow the helicopter to follow certain trajectories. Finally, the ensuing vibrations when an external perturbation is applied to the main rotor are investigated.

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Wells, Andrew K. "Slat aerodynamics and aeroacoustics with flow control". Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/49932/.

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This study primarily investigated the flow and aeroacoustics associated with the slat of a three-element aerofoil in approach conditions. The study assessed importance of several factors and examined their aerodynamic impacts. The factors investigated were aerofoil incidence, slat angle, slat cusp geometry, fixing transition and blowing in the slat cove. A combination of experimental and computational techniques investigated the factors selected. The experimental work employed PIV, pressure tap, a force balance, flush mounted microphones and an acoustic array. The computational work used DES along with the FW-H acoustic analogy to obtain the far-field directivity. Tonal features occurred at high incidence and originated at the slat trailing edge, due to the blunt trailing edge and gap, and at the reattachment point. Fixing transition removes the tone at the reattachment point and reduces the slat gap tone at the trailing edge but does not remove the tone generated by the blunt trailing edge. All of the tones found, only occurred at certain slat and wing settings. Broadband sound was present in all conditions but had a strong dependence on the incidence of the wing. The sound was loudest with the wing at  = 5o with a reduction as the wing incidence was increased. The broadband sound also reduced as the slat angel decreased from S = 23o. The shear incidence angle was a good indicator of the impact of these two factors on the sound generated. Extending the slat cusp reduced the broadband sound at low aerofoil incidence. However, for   10o the extension led to increased broadband sound. Neither blowing nor fixing transition had a significant impact on the broadband sound generated by the slat system. The aerodynamic loads generated by the wing were mainly dependent on the aerofoil incidence. However, other factors did influence the forces generated. Reducing the slat angle increased the lift generated by the wing especially at low aerofoil incidence but the lift to drag ratio was unaltered. At high aerofoil incidence, extending the slat cusp reduced the lift generated. Blowing and fixing transition did not significantly alter the forces generated by the wing.

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Libros sobre el tema "Motor vehicles Drag (Aerodynamics)"

Trefny, Charles J. On the use of external burning to reduce aerospace vehicle transonic drag. [Washington, D.C.]: NASA, 1990.

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Fijałkowski, Bogdan. Modele matematyczne wybranych lotniczych i motoryzacyjnych mechano-elektro-termicznych dyskretnych nadsystemów dynamicznych. Kraków: Politechnika Krakowska im. Tadeusza Kościuszki, 1987.

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Livesay, Ed. Design, creation, and proper use of a drag device for the determination of drag factor. Jacksonville, Fla: Institute of Police Technology and Management, University of North Florida, 1999.

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Mini Conference on Vehicle System Dynamics, Identification, and Anomalies (2nd 1990 Budapesti Műszaki Egyetem). Proceedings of the 2nd Mini Conference on Vehicle System Dynamics, Identification, and Anomalies: Held at the Technical University of Budapest, Hungary, Budapest, 12-15 November, 1990. Budapest: Technical University of Budapest, 1992.

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Gilyard, Glenn B. In-flight transport performance optimization: An experimental flight research program and an operational scenario. Edwards, Calif: National Aeronautics and Space Administration, Dryden Flight Research Center, 1997.

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Claude, Lichtenstein y Engler Franz 1949-, eds. Streamlined: A metaphor for progress : the esthetics of minimized drag. [Baden, Switzerland]: Lars Müller, 1990.

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Streamlined: A metaphor for progress : the esthetics of minimized drag. Baden: Lars Müller, 1995.

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Claude, Lichtenstein y Engler Franz 1949-, eds. Streamlined: A metaphor for progress : the esthetics of mimimized drag. Baden, Switzerland: Lars Muüller, 1990.

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1958-, Sumantran V. y Sovran Gino, eds. Vehicle aerodynamics. Warrendale, PA: Society of Automotive Engineers, 1996.

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Capítulos de libros sobre el tema "Motor vehicles Drag (Aerodynamics)"

Pankajakshan, Ramesh, C. Bruce Hilbert y David L. Whitfield. "Passive Devices for Reducing Base Pressure Drag in Class 8 Trucks". En The Aerodynamics of Heavy Vehicles III, 227–35. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-20122-1_14.

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Elofsson, Per, Guillaume Mercier, Bradley D. Duncan y Samuel Boissinot. "Accurate Drag Prediction Using Transient Aerodynamics Simulations for a Heavy Truck in Yaw Flow". En The Aerodynamics of Heavy Vehicles III, 343–60. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-20122-1_22.

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Bruneau, Charles-Henri, Emmanuel Creusé, Delphine Depeyras, Patrick Gilliéron y Iraj Mortazavi. "Analysis of the Active and Passive Drag Reduction Strategies Behind a Square Back Ground Vehicle". En The Aerodynamics of Heavy Vehicles III, 363–76. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-20122-1_23.

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Kehs, J., K. Visser, J. Grossmann, C. Horrell y A. Smith. "Experimental and Full Scale Investigation of Base Cavity Drag Reduction Devices for Use on Ground Transport Vehicles". En The Aerodynamics of Heavy Vehicles III, 269–83. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-20122-1_17.

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Hsu, Tsun-Ya, Mustapha Hammache y Fred Browand. "Base Flaps and Oscillatory Perturbations to Decrease Base Drag". En The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains, 303–16. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-44419-0_27.

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Seifert, A., O. Stalnov, D. Sperber, G. Arwatz, V. Palei, S. David, I. Dayan y I. Fono. "Large Trucks Drag Reduction using Active Flow Control". En The Aerodynamics of Heavy Vehicles II: Trucks, Buses, and Trains, 115–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-85070-0_10.

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Paul, James C. "Aerodynamic Drag Reduction of Open-Top Gondola and Hopper Cars in Unit Train Operation and Impact on Train Fuel Consumption and Economics". En The Aerodynamics of Heavy Vehicles III, 37–59. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-20122-1_3.

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Cooper, Kevin R. "Commercial Vehicle Aerodynamic Drag Reduction: Historical Perspective as a Guide". En The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains, 9–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-44419-0_2.

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Arcas, D. R. y L. G. Redekopp. "Drag Reduction of Two-Dimensional Bodies by Addition of Boat Tails". En The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains, 237–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-44419-0_23.

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Coon, J. D. y K. D. Visser. "Drag Reduction of a Tractor-Trailer Using Planar Boat Tail Plates". En The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains, 249–65. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-44419-0_24.

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Actas de conferencias sobre el tema "Motor vehicles Drag (Aerodynamics)"

d'Hondt, Marion, Patrick Gillieron y Philippe Devinant. "Aerodynamic drag and flow rate through engine compartments of motor vehicles". En 28th AIAA Applied Aerodynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-4955.

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Watkins, Simon y Clive Humphris. "Solar Vehicles: The Challenge of Maximum Speed From Minimal Power". En ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/fedsm2002-31245.

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The World Solar Challenge is a race from Darwin to Adelaide which attracts purpose-built vehicles from around the world. Using only power from the sun, the vehicles reach speeds of over 100 km/hr and the current record holder averaged a speed of over 90 km/hr. In this paper the background to the race and some of the technology used is described. Since aerodynamic drag is the major resistance to motion, this is examined in detail, including the testing and design principles applied to the Australian “Aurora” vehicle which won the race in 1999 and came second in 2001. A highly efficient electric motor, developed specifically for the Aurora is also described.

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Driant, Thomas, Stéphane Moreau, Hachimi Fellouah y Alain Desrochers. "Aero-Thermal Optimization of a Hybrid Roadster Tricycle Using Multidisciplinary Design Optimization Tools". En ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21505.

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To reach the goal of continuous improvement on automotive vehicles, their overall design strategy needs to be reconsidered. Hence, the future design will have to use global approaches like those developed in the aerospace industry where optimization of all interacting fields is performed jointly. This strategy has been applied to the development and optimization of a hybrid roadster aero-thermal management as part of a major Automotive Partnership Canada (APC) project1. The study presented herein seeks the best compromise between the vehicle aerodynamic drag and the cooling efficiency for the internal combustion engine (ICE) and the electric motor. The optimization of the heat exchanger position is first achieved followed by a multidisciplinary design optimization (MDO) approach with three main steps: first, a design of experiment (DOE) involving parametric CAD model generation, steady state CFD calculations and a heat exchanger optimization loop; secondly, approximations of response surfaces methods; finally, multi-objective optimization on the response surfaces using genetic algorithms and particle swarms. The study is constrained to use the automotive manufacturer’s software and to consider the vehicle environment without bringing significant modifications on non-thermal/aerodynamic parts.

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De Kock, J. P., R. F. Laubscher, Sunita Kruger y N. Janse van Rensburg. "Numerical and Experimental Aerodynamic Evaluation of a Solar Vehicle". En ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71297.

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Solar car racing has created a competitive platform for research into alternative energy solutions and aids development in the green engineering space. The University of Johannesburg’s Solar Racing team developed a vehicle (Ilanga II) to compete in the 2014 South African Solar Car Challenge. This paper describes the numerical optimization of the vehicle’s body shape, utilizing Computational Fluid Dynamics (CFD) and finally compares the simulated results with the actual performance during the race. Motor control data is used to determine the aerodynamic drag coefficient of the vehicle. This work builds on the paper submitted in 2014 [1], which postulated the use of the Hermite cubic function in conjunction with the shape function analysis as a holistic design tool. By analyzing the motor control data it is possible to comment on the effectiveness of the shape function analysis technique. The final optimized design predicted a straight-line ACd 0.078. A yaw angle characterization study of ±25° degrees, in conjunction with historic weather data were used to fully characterize the vehicle with an average drag area coefficient of 0.119. The final comparative results of the simulated data and the race data show that the vehicle’s straight-line (Zero yaw) ACd was 11.2% higher than the simulated results, whereas the average aerodynamic characteristic ACd was 2.43% lower than the simulated results.

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Sirenko, Volodymyr, Roman Pavlovs’ky y Upendra S. Rohatgi. "Methods of Reducing Vehicle Aerodynamic Drag". En ASME 2012 Fluids Engineering Division Summer Meeting collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/fedsm2012-72491.

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A small scale model (length 1710 mm) of General Motor SUV was built and tested in the wind tunnel for expected wind conditions and road clearance. Two passive devices, rear screen which is plate behind the car and rear fairing where the end of the car is aerodynamically extended, were incorporated in the model and tested in the wind tunnel for different wind conditions. The conclusion is that rear screen could reduce drag up to 6.5% and rear fairing can reduce the drag by 26%. There were additional tests for front edging and rear vortex generators. The results for drag reduction were mixed. It should be noted that there are aesthetic and practical considerations that may allow only partial implementation of these or any drag reduction options.

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Hassan, Basil, Walter Gutierrez, Walter Wolfe, Mary Walker, Bruce Ruefer y Jeffrey Hurt. "Numerical prediction of aerodynamic drag for heavy ground transportation vehicles". En 13th Applied Aerodynamics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1995. http://dx.doi.org/10.2514/6.1995-1913.

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Heidemann Jr, R., A. F. A. Rodrigues, A. Bohrer, C. L. Gertz y A. Cervieri. "Underbody aerodynamics: Drag coefficient reduction in road vehicles". En 2018 SAE Brasil Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2018. http://dx.doi.org/10.4271/2018-36-0291.

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Ramchandran, Gautham, Archana Nepak y Yagnavalkya S. Mukkamala. "Re-designing door handles to reduce aerodynamic drag in road vehicles". En 32nd AIAA Applied Aerodynamics Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2014. http://dx.doi.org/10.2514/6.2014-2013.

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Langener, Tobias, Leik Myrabo y Zvi Rusak. "Inlet Aerodynamics and Ram-Drag of Laser-Propelled Lightcraft Vehicles". En 45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2009. http://dx.doi.org/10.2514/6.2009-4806.

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Langener, Tobias, Leik Myrabo, Zvi Rusak, Claude Phipps, Kimiya Komurasaki y John Sinko. "Inlet Aerodynamics and Ram Drag of Laser-Propelled Lightcraft Vehicles". En BEAMED ENERGY PROPULSION: 6th International Symposium. AIP, 2010. http://dx.doi.org/10.1063/1.3435458.

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