Numerical Study of Cylinder Drag Coefficient Reduction Using Passive Flow Control [PDF]
مهندسی مکانیک شریف, 2022 In this study, the cylinder drag coefficient is reduced by using passive flow control. Installing a flat plate in two heights and different longitudinal distances in upstream flow increases the upstream flow momentum of the cylinder, leading to the ...
S. sh. Sadeghi, N. Nabatian
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Control of Turbulent Flow over a Circular Cylinder Using Tabs
Mathematics, 2023 In this study, we investigate tabs applied to turbulent flow over a circular cylinder for the reductions of the mean drag and lift fluctuations. Tabs are small and thin passive devices attached to the upper and lower surfaces of a circular cylinder near ...
Junyoung Seo, Jinhyeok Yun, Jungil Lee
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Comparison of Passive Flow Control Methods for a Cavity in Transonic Flow [PDF]
Journal of Aircraft, 2016 A comparative study of different passive control techniques was conducted on a cavity with a length of 320 mm with length-to-depth and length-to-width ratios of five and two, respectively. The tests were conducted at a freestream Mach number of 0.71. Both leading-edge and trailing-edge modifications were included in the studies.
Saddington, A. J. +2 more
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Active and Passive Control of Flow Past a Cavity
, 2011 Flow past open cavities is well known to give rise to highly coherent and self-sustained oscillations, leading to undesirable aeroacoustic resonance. Cavity flows are encountered not only in engineering applications but also our daily life, for example, the weapon bays, landing gears and wheel wells of aircrafts, in the depressions of submarine and ...
Seiichiro Izawa
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The control of the displacement of a passive particle in a point vortex flow
Journal of Computational Methods in Sciences and Engineering, 2021 This work reports numerical explorations in advection of one passive tracer by point vortices living in the unbounded plane. The main objective is to find the energy-optimal displacement of one passive particle (point vortex with zero circulation) surrounded by N point vortices. The direct formulation of the corresponding control problems is presented.
Balsa, Carlos, Gama, Sílvio M.A.
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Numerical Study of Combined Drag Reduction Bases on Vortex Generators and Riblets for the Ahmed Body using IDDES Methodology [PDF]
Journal of Applied Fluid Mechanics, 2022 The flow fields around vehicle drag reduction devices are three-dimensional, complicated, and unsteady. Meanwhile, the small scale of the drag reduction device brings more challenges to the simulation. An Improved Delayed Detached Eddy Simulation (IDDES)
X. Yang, Y. Hu, Z. Gong, J. Jian, Z. Liu
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CFD Investigation of a Hybrid Wells Turbine with Passive Flow Control
Energies, 2023 In the past decade, there has been renewed interest in wave energy harvesting utilizing oscillating water columns (OWC), one of the most well-studied wave energy harnessing technologies.
Mohammad Nasim Uddin +2 more
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Influence of the dimple size and spacing for passive flow control in blended wing body aerodynamics: a CFD investigation [PDF]
Royal Society Open ScienceBlended wing body (BWB) aircraft have re-emerged as a research focus owing to their potential for enhanced aerodynamic efficiency and fuel economy.
Haris Ali +2 more
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Biomimetic bluff body drag reduction by self-adaptive porous flaps [PDF]
, 2011 The performances of an original passive control system based on a biomimetic approach are assessed by investigating the flow over a bluff-body. This control device consists in a couple of flaps made from the combination of a rigid plastic skeleton coated
Alben +29 more
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Passive Transonic Shock Control on Bump Flow for Wing Buffet Suppression
Aerospace, 2023 Since modern transport aircraft cruise at transonic speeds, shock buffet alleviation is one indispensable challenge that civil transport research needs to be addressed.
Davide Di Pasquale, Simon Prince
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