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Viewing 1 to 37 of 37
Journal Article
2017-03-28
Author(s): Dianat, M., Skarysz, M., Hodgson, G., Garmory, A. et al.
Abstract The motivation for this paper is to predict the flow of water over exterior surfaces of road vehicles. We present simulations of liquid flows on solid surfaces under the influence of gravity ....
Technical Paper
2017-03-28
Author(s): Lew, C., Gopalaswamy, N., Shock, R., Duncan, B. et al.
Abstract The aerodynamics of a rotating tire can contribute up to a third of the overall aerodynamic force on the vehicle. The flow around a rotating tire is very complex and is often affected by smal....
Journal Article
2017-03-28
Author(s): Yamashita, T., Makihara, T., Maeda, K., and Tadakuma, K.
Abstract In recent years, the automotive manufacturers have been working to reduce fuel consumption in order to cut down on CO2 emissions, promoting weight reduction as one of the fuel saving counterm....
Journal Article
2017-03-28
Author(s): Varney, M., Passmore, M., and Gaylard, A.
Abstract Sports Utility Vehicles (SUVs) typically have a blunt rear end shape (for design and practicality), however this is not beneficial for aerodynamic drag. Drag can be reduced by a number of pas....
Journal Article
2017-03-28
Author(s): Fu, C., Uddin, M., Robinson, C., Guzman, A. et al.
Abstract Cost benefit and teraflop restrictions imposed by racing sanctioning bodies make steady-state RANS CFD simulation a widely accepted first approximation tool for aerodynamics evaluations in mo....
Journal Article
2017-03-28
Author(s): Newbon, J., Sims-Williams, D., and Dominy, R.
Abstract The effect of the upstream wake of a Formula 1 car on a following vehicle has been investigated using experimental and computational methods. Multiple vehicle studies in conventional length w....
Journal Article
2017-03-28
Author(s): Terakado, S., Makihara, T., Sugiyama, T., Maeda, K. et al.
Abstract With advancement of aeroacoustic wind tunnels and CAE technology, aeroacoustic cabin noise in steady flow has been improved. On the other hand, passenger comfort is also impacted by aeroacous....
Journal Article
2017-03-28
Author(s): Jilesen, J., Gaylard, A., and Escobar, J.
Abstract Vehicle rear and side body soiling has been a concern since the earliest cars. Traditionally, soiling has been seen to be less importance than vehicle aerodynamics and acoustics. However, inc....
Technical Paper
2017-03-28
Author(s): Lopes, Y., Taylor, M., Lounsberry, T., and Fadler, G.
Abstract Typical production vehicle development includes road testing of a vehicle towing a trailer to evaluate powertrain thermal performance. In order to correlate tests with simulations, the aerody....
Journal Article
2017-03-28
Author(s): Phan, V., Tanaka, H., Nagatani, T., Wakamatsu, M. et al.
Abstract High frequency wind noise caused by turbulent flow around the front pillars of a vehicle is an important factor for customer perception of ride comfort. In order to reduce undesirable interio....
Technical Paper
2017-03-28
Author(s): Gan, J., Li, L., Zha, G., and Czlapinski, C.
Abstract This paper conducts numerical simulation and wind tunnel testing to demonstrate the passive flow control jet boat tail (JBT) drag reduction technique for a heavy duty truck rear view mirror. ....
Technical Paper
2017-03-28
Author(s): Bhardwaj, A.
Abstract Improving brake cooling has commanded substantial research in the automotive sector, as safety remains paramount in vehicles of which brakes are a crucial component. To prevent problems like ....
Journal Article
2017-03-28
Author(s): Howell, J., Forbes, D., Passmore, M., and Page, G.
Abstract In the wind tunnel the effect of a wind input on the aerodynamic characteristics of any road vehicle is simulated by yawing the vehicle. This represents a wind input where the wind velocity i....
Journal Article
2017-03-28
Author(s): Dalessio, L., Duncan, B., Chang, C., Gargoloff, J. et al.
Abstract The ultimate goal for vehicle aerodynamicists is to develop vehicles that perform well on the road under real-world conditions. One of the most important metrics to evaluate vehicle performan....
Journal Article
2017-03-28
Author(s): Tortosa, N., Schroeck, D., Nagle, T., and Flynt, G.
Abstract The General Motors Reduced Scale Wind Tunnel Facility, which came into operation in the fall of 2015, is a new state-of-the-art scale model aerodynamic test facility that expands GM’s test ca....
Journal Article
2017-03-28
Author(s): Jakirlic, S., Kutej, L., Unterlechner, P., and Tropea, C.
Abstract Some widely-used scale-resolving turbulence models are comparatively assessed in simulating the aerodynamic behavior of a full-scale AUDI-A1 car configuration. The presently considered hybrid....
Technical Paper
2017-03-28
Author(s): Taniguchi, K., Shibata, A., Murakami, M., and Oshima, M.
Abstract This paper describes a study of drag reduction devices for production pick-up trucks with a body-on-frame structure using full-scale wind tunnel testing and Computational Fluid Dynamics (CFD)....
Journal Article
2017-03-28
Author(s): Bao, D., Jia, Q., and Yang, Z.
Abstract Based on a 1:15 scaled 3/4 open jet automotive wind tunnel, this paper studies the effect of vortex generator on the buffeting phenomenon. The mean velocity, static pressure gradient, turbule....
Technical Paper
2017-03-28
Author(s): Simmonds, N., Pitman, J., Tsoutsanis, P., Jenkins, K. et al.
Abstract Cooling drag, typically known as the difference in drag coefficient between open and closed cooling configurations, has traditionally proven to be a difficult flow phenomenon to predict using....
Journal Article
2017-03-28
Author(s): Larson, L., Gin, R., and Lietz, R.
Abstract Cooling drag is a metric that measures the influence of air flow travelling through the open grille of a ground vehicle on overall vehicle drag, both internally (engine air flow) and external....
Journal Article
2017-03-28
Author(s): Wittmeier, F.
Abstract After being in operation since 1989, the 25% / 20% model scale wind tunnel of University of Stuttgart received its second major upgrade in 2016. In a first upgrade in 2001, a rolling road wit....
Journal Article
2017-03-28
Author(s): Nakasato, K., Tsubokura, M., Ikeda, J., Onishi, K. et al.
Abstract Because of rising demands to improve aerodynamic performance owing to its impact on vehicle dynamics, efforts were previously made to reduce aerodynamic lift and yawing moment based on steady....
Technical Paper
2017-03-28
Author(s): Lietz, R., Larson, L., Bachant, P., Goldstein, J. et al.
Abstract The number of computational fluid dynamics (CFD) simulations performed during the vehicle aerodynamic development process continues to expand at a rapid rate. One key contributor to this tren....
Journal Article
2017-03-28
Author(s): Maduta, R. and Jakirlic, S.
Abstract The present work is concerned with the Steady RANS (Reynolds-Averaged Navier-Stokes) computations of inherently unsteady separating flow configurations. The focus is on the flow past the well....
Journal Article
2017-03-28
Author(s): Blacha, T. and Islam, M.
Abstract The aerodynamic development of the new Audi Q5 (released in 2017) is described. In the course of the optimization process a number of different tools has been applied depending on the chronol....
Journal Article
2017-03-28
Author(s): Larson, L., Woodiga, S., Gin, R., and Lietz, R.
Abstract The airflow that enters the front grille of a ground vehicle for the purpose of component cooling has a significant effect on aerodynamic drag (engine airflow drag). Furthermore, engine airfl....
Journal Article
2017-03-28
Author(s): Hobeika, T., Gullberg, P., Sebben, S., and Lofdahl, L.
Abstract Quantification of heat exchanger performance in its operative environment is in many engineering applications an essential task, and the air flow rate through the heat exchanger core is an im....
Journal Article
2017-03-28
Author(s): Guzman, A., Cho, Y., Tripp, J., and Srinivasan, K.
Abstract Pickup trucks are designed with a taller ride height and a larger tire envelope compared to other vehicle types given the duty cycle and environment they operate in. These differences play an....
Journal Article
2017-03-28
Author(s): Ljungskog, E., Sebben, S., Broniewicz, A., and Landström, C.
Abstract Many aerodynamic wind tunnels used for testing of ground vehicles have advanced ground simulation systems to account for the relative motion between the ground and the vehicle. One commonly u....
Journal Article
2017-03-28
Author(s): Yuan, H., Yang, Z., and Li, Q.
Abstract External rear view mirror is attached at the side of the vehicle which is to permit clear vision for the driver to the rear of the vehicle. When the vehicle is running, the flow field around ....
Journal Article
2017-03-28
Author(s): Honeycutt, D. and Uddin, M.
Abstract Although, the implementation of lift-off prevention devices such as the NASCAR roof flaps have greatly reduced the frequency and severity of race vehicle aerodynamic lift-off incidents, airbo....
Technical Paper
2017-03-28
Author(s): Lewington, N., Ohra-aho, L., Lange, O., and Rudnik, K.
Abstract Industry trends towards lighter, more aerodynamically efficient road vehicles have the potential to degrade a vehicle’s response to crosswinds. In this paper, a methodology is outlined that i....
Technical Paper
2017-03-28
Author(s): Soares, R., Garry, K., and Holt, J.
Abstract The flow field and body aerodynamic loads on the DrivAer reference model have been extensively investigated since its introduction in 2012. However, there is a relative lack of information re....
Journal Article
2017-03-28
Author(s): Cho, Y., Chang, C., Shestopalov, A., and Tate, E.
Abstract The airflow into the engine bay of a passenger car is used for cooling down essential components of the vehicle, such as powertrain, air-conditioning compressor, intake charge air, batteries,....
Journal Article
2017-03-28
Author(s): Wang, F., Yin, Z., Yan, S., Zhan, J. et al.
Abstract The validation of vehicle aerodynamic simulation results to wind tunnel test results and simulation accuracy improvement attract considerable attention of many automotive manufacturers. In or....
Journal Article
2017-03-28
Author(s): Kabanovs, A., Hodgson, G., Garmory, A., Passmore, M. et al.
Abstract The motivation for this paper is to consider the effect of rear end geometry on rear soiling using a representative generic SUV body. In particular the effect of varying the top slant angle i....
Journal Article
2017-03-28
Author(s): Song, K., Choo, K., and Mavris, D.
Abstract In early phases of conceptual design stages for developing a new car in the modern automobile industry, the lack of systematic methodology to efficiently converge to an agreement between the ....
Viewing 1 to 37 of 37