Characteristics of Flow Behind a Passenger Vehicle

Song, Jun; Yoshioka, Shuya; Kato, Takuma; Kohama, Yasuaki

doi:10.4271/2006-01-1030

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…The movable underbody diffuser technology is used for reducing aerodynamic drag in the vehicle by controlling rear flow field. For instance, it is extensively revealed that the rear flow field of vehicle is influenced by the flow coming out under the vehicles which implies that the rear flow field can be modified by controlling the flow under the vehicles [16,17]. Kang et al [18] developed a movable under body diffuser as shown in Figure 1 and Figure 2, and numerically investigated that the automobile's aerodynamic drag could be reduced by an average of more than 4%, which would help to enhance the constant speed fuel efficiency by approximately 2% at a range of driving speeds exceeding 70 km/h.…”

Section: Movable Underbody Diffusermentioning

confidence: 99%

Review on Aerodynamic Drag Reduction of Vehicles

Mukut

Abedin

2019

IJEMM

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Due to higher price, limited supply and negative impacts on environment by fossil fuel, automobile industries have directed their concentrations in reducing the fuel consumption of vehicles in order to achieve the lower aerodynamic drag. As a consequence, numerous researches have been carried out throughout the world for not only getting the optimum aerodynamic design with lower drag penalty and but also other parameters that increases the fuel consumption. In this regard, relevant experimental and numerical outcomes on vehicle drag reduction considering various techniques such as active, passive and combined techniques in order to delay or suppress flow separation behind the vehicles have been considered in this review paper. Furthermore, the effects of drag reduction and their applicability on the vehicles are also illustrated in this paper. Therefore, it is conjectured that the drag reduction has been improved as much as 20%, 21.2%, and 30% by using the active, passive and combined control systems, respectively.

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Section: Movable Underbody Diffusermentioning

confidence: 99%

Review on Aerodynamic Drag Reduction of Vehicles

Mukut

Abedin

2019

IJEMM

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“…To reduce aerodynamic drag, several studies have analyzed the structural modification of vehicles [14], for example, by studying the influence of the wheels [15], the influence of flaps [16], or performing different types of rounding in the outer parts of the rear area, some of the purposes being the control of vortices [17], turbulence [18], boundary layer or drag force [19].…”

Section: Introductionmentioning

confidence: 99%

An Original Aerodynamic Ducting System to Improve Energy Efficiency in the Automotive Industry

et al. 2023

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In the automotive industry, the flow of air generates high resistance in the advance of vehicles. In light of this situation, the objective of the present invention is to take advantage of the force of the air itself to help propel vehicles and thus reduce fuel consumption. A channeling system has been designed based on a deflector that collects the air that impacts against the vehicle at the front, transferring it to the rear where it is expelled, allowing the vacuum zone to be filled so that the high pressures of the channeled air are repositioned in the depression zone, significantly increasing the values of the pressures, including those that were previously negative. The deflector has been built and incorporated into a model car so that comparative experimental wind tunnel tests could be carried out to verify that the vacuum in the rear area is eliminated, and positive pressure is obtained.

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