Comparison of Steady Blowing and Synthetic Jets for Aerodynamic Drag Reduction of a Simplified Vehicle

Cui, Wenshi; Zhu, Hehua; Xia, Chao; Yang, Zhigang

doi:10.1016/j.proeng.2015.11.224

Cited by 15 publications

(14 citation statements)

References 6 publications

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“…The frequency inverter operates in the range of 0-50 Hz and has 0.1 Hz step. The wind tunnel tests were carried out in the range of 3.8×10 5 -7.9×10 5 Reynolds numbers, based on length of bus models. The minimum and maximum free stream velocity in the range of 0-30 m/s in wind tunnel.…”

Section: Methodsmentioning

confidence: 99%

“…As passive flow control, bumper design was changed and drag force improved the up to 3.08% with the in accordance with reference model [4]. The drag coefficient was reduced by 3% -9% by regularly air jetting behind the model [5]. The flow structure around of a bus model was experimentally investigated.…”

Section: Introductionmentioning

confidence: 99%

“…The pressure distribution on the model 3 bus at 5.4x105 Reynolds number The streamline image of model 3 bus at 5.4x105 Reynolds numberFigure 12a.The vector image of model 3 at 5.4x10 5 Reynolds number Figure 12b.The vector image of model 3 at 5.4x10 5 Reynolds numberFigure 12c.The vector image of model 3 at 5.4x10 5 Reynolds number…”

mentioning

confidence: 99%

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Drag reduction of a bus model by passive flow canal

Bayındırlı

2019

International Journal of Energy Applications and Technologies

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In this study, the drag force of 1/33 scale bus model was improved by passive flow control method. The effect of passive air canal application to drag coefficient was experimentally and numerically investigated on a bus model. Experiments were carried out in the range of 3.8x10 5-7.9x10 5 Reynolds numbers. The similarity conditions were provided in experimental studies with the exception of the moving road. To provide the geometric similarity condition, the model bus was produced in 3D printer by scanning 3 dimensions. Reynolds number independence was used for dynamic similarity condition. The rate of blockage is 6.81% for kinematic similarity, which is lower than the rate of blockage accepted in the literature. Respectively 4.21%, 7.48% and 12.19% aerodynamic improvement achieved with 1, 3, and 5 passive air canals whose diameter 6 mm. Flow analysis was performed in Fluent® program of the model 3 bus to view the flow structure around the bus. The numerical results support to wind tunnel results. In this study the effect of obtained aerodynamic improvements by applied passive flow control method can decrease fuel consumption about 2-6% at high vehicle speeds.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Drag reduction of a bus model by passive flow canal

Bayındırlı

2019

International Journal of Energy Applications and Technologies

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“…The results of numerical studies were verified with experimental studies. They reduced aerodynamic drag coefficient by 3% -9% by regularly air jetting behind the model [2]. According to Mohamed-Kassim and Filippone (2010), the fuel consumption can be improved from 1% to 17% using passive flow control parts on truck trailers.…”

Section: Introductionmentioning

confidence: 99%

“…The fuel consumption reduces about 1% when the CD coefficient of a vehicle reduces by 2% at high speeds [1]. Cui et al (2015) investigated the effect of synthetic air jetting on an Ahmed body model using the Large Eddy Smilation turbulence model in the CFD method. The results of numerical studies were verified with experimental studies.…”

Section: Introductionmentioning

confidence: 99%

The Experimentally and Numerically Determination Of The Drag Coefficient Of A Bus Model

Bayındırlı¹,

Çelik

2018

International Journal of Automotive Engineering and Technologies

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In this study, the drag coefficient of a 1/33 scaled bus model was determined by experimentally in wind tunnel and numerically in Fluent®. The tests were performed at 6 different free flow velocities and between the range of 382 866-792 900 Reynolds numbers and 13.54m/s-28.05m/s speeds. The three similarity conditions were provided in tests. The flow analyses were conducted in 1/40 scaled wind tunnel as experimentally using Reynolds independent. The aerodynamic drag coefficient (CD) of the bus model was calculated as 0.633 in wind tunnel. The experimental results of bus model are verificated by numerical flow analysis in Fluent® program. According to numerical results, the drag coefficient of bus model is calculated as 0.645 with 1.81% error margin.

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Research on active flow control to reduce aerodynamic drag of mira notchback model

Zhang,

Zhou,

et al. 2023

J Mech Sci Technol

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Comparison of Steady Blowing and Synthetic Jets for Aerodynamic Drag Reduction of a Simplified Vehicle

Cited by 15 publications

References 6 publications

Drag reduction of a bus model by passive flow canal

Drag reduction of a bus model by passive flow canal

The Experimentally and Numerically Determination Of The Drag Coefficient Of A Bus Model

Research on active flow control to reduce aerodynamic drag of mira notchback model

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