Aerodynamic Drag Mechanisms of Bluff Bodies and Road Vehicles

Sovran, Gino; Morel, Thomas; Mason, William T.

doi:10.1007/978-1-4684-8434-2

Cited by 45 publications

(3 citation statements)

References 31 publications

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“…For this configuration, the drag reduction is seen to improve with increasing back face hole diameter up to the maximum diameter considered (1S-4B). These results agree generally with findings reported by Mair [9] on configurations using flow injection techniques (no side face porosity), where larger hole diameters in the base region, at low bleed rates, provide the most benefit. Compared to the 'closed' configuration, total reductions of CD  -12% for  = 0, and CD  -6% for  = 10.5, were measured.…”

Section: Resultssupporting

confidence: 92%

“…Comparative bleed rates for minimum base pressure conditions are also presented in Mair [9]. Assessment of optimum back and side face porosity levels also showed general agreement with previous work [1,2,4,8] with the combination of 22.1 < B < 39.2 and S  1.3% for the back, and sides faces respectively (as defined in the current study), within the range showing the largest drag reduction.…”

Section: Resultssupporting

confidence: 87%

“…As the influence of flow misalignment on bluff-bodies similar in shape to large vehicles is yet to be reported, this will be one focus of the work. Porosity level, and different hole diameters, are also considered, with final assessments made in terms of internal plenum pressure, measured drag force, and comparisons to data from similar configurations [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Passive Porosity as a Means for Bluff-Body Drag Reduction

Gatto¹,

Babinsky²

2018

SAE Int. J. Commer. Veh.

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An investigation into the capability of passive porosity to reduce the drag of a bluff-body is presented. This initial work involves integrating varying degrees of porosity into the side and back faces of a small-scale model to determine optimum conditions for maximum drag reduction. Both force and pressure measurements at differing degrees of model yaw are presented, with the conditions for optimum performance, identified. At a length-based Reynolds number of 2.3x10 6 , results showed a maximum drag reduction of 12% at zero yaw when the ratio of the open area on the back face relative to the side faces was between two and four. For all non-zero yaw angles tested, this ratio reduced to approximately two, with the drag benefit reducing to 6% at 10.5 degrees. From a supplementary theoretical analysis, calculated optimum bleed rate into the base for maximum drag reduction, also showed reasonable agreement to other results reported previously.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

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Investigation of Passive Porosity as a Means for Bluff-Body Drag Reduction

Gatto¹,

Babinsky²

2018

SAE Int. J. Commer. Veh.

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Building a low cost wind turbine in highways for rural house electricity demand

Santhakumar¹,

Palanivel²,

Venkatasubramanian³

2018

Env Prog and Sustain Energy

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The main aim of this work is to design, fabricate, and test a wind turbine for power generation applications in rural areas. Vertical Axis Wind Turbines were selected to harness the energy from wind through the drag forces induced due to vehicular movements. Various parameters were analyzed for the design of a low‐cost wind turbine. A Savonius blade was selected for the design, which could be accommodated on the median of the highways. By using recycled materials, a low‐cost wind turbine was fabricated at a cost of $117.5 approximately. The wind turbine was placed on the houses and on the highway medians to test the power output at various operating conditions. Average electricity consumption at selected rural houses were calculated. The calculated average electricity demand during power cuts in the selected rural houses was around 0.2–0.6 kWh/day. Average generated electricity from the turbine at highways was observed to be around 0.67 kWh/day. The Levelized cost of electricity (LCOE) of the generated electricity from the proposed SWT on highways is around $0.04/kWh. The LCOE of the proposed design is relatively cheaper when compared with the conventional horizontal axis wind turbines. The energy demand during power cuts was met completely when the SWT was placed on the highways. © 2018 American Institute of Chemical Engineers Environ Prog, 38: 278–285, 2019

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Aerodynamics of Road Vehicles

Morel

1984

Fuel Economy

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Aerodynamic Drag Mechanisms of Bluff Bodies and Road Vehicles

Cited by 45 publications

References 31 publications

Investigation of Passive Porosity as a Means for Bluff-Body Drag Reduction

Investigation of Passive Porosity as a Means for Bluff-Body Drag Reduction

Building a low cost wind turbine in highways for rural house electricity demand

Aerodynamics of Road Vehicles

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