Evaluation of aerodynamic performance enhancement of Risø_B1 airfoil with an optimized cavity by PIV measurement

Nili-Ahmadabadi, Mahdi; Nematollahi, Omid; Fatehi, Mostafa; Cho, Dae‐Seung; Kim, Kyung Chun

doi:10.1007/s12650-020-00658-7

Cited by 8 publications

(3 citation statements)

References 27 publications

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“…For calculation 3, geometries were tested for various angles of attack. Each geometry base on a Risø B1-18 airfoil and optimized cavities was reproduced from papers [28,29]. The shape of the geometry is presented in Figure 8.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…Fatehi et al (2019) [28] showed that the numerically optimized cavity on the suction surface significantly increased the lift-to-drag ratio. Nili-Ahmadabadi et al (2020) [29] optimized a cavity on a Risø-B1-18 airfoil at an off-design angle of attack. For the optimization, the authors defined the cavity geometry (the wall shape, depth, and mouth of the cavity, as well as the height of the cavity), location of the cavity, and downstream upper surface by 16 parameters.…”

Section: Introductionmentioning

confidence: 99%

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Vortex Trapping Cavity on Airfoil: High-Order Penalized Vortex Method Numerical Simulation and Water Tunnel Experimental Investigation

2021

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This paper presents a two-dimensional implementation of the high-order penalized vortex in cell method applied to solve the flow past an airfoil with a vortex trapping cavity operating under moderate Reynolds number. The purpose of this article is to investigate the fundamentals of the vortex trapping cavity. The first part of the paper treats with the numerical implementation of the method and high-order schemes incorporated into the algorithm. Poisson, stream-velocity, advection, and diffusion equations were solved. The derivation, finite difference formulation, Lagrangian particle remeshing procedure, and accuracy tests were shown. Flow past complex geometries was possible through the penalization method. A procedure description for preparing geometry data was included. The entire methodology was tested with flow past impulsively started cylinder for three Reynolds numbers: 550, 3000, 9500. Drag coefficient, streamlines, and vorticity contours were checked against results obtained by other authors. Afterwards, simulations and experimental results are presented for a standard airfoil and those equipped with a trapping vortex cavity. Airfoil with an optimized cavity shape was tested under three angles of attack: 3°, 6°, 9°. The Reynolds number is equal to Re = 2 × 104. Apart from performing flow analysis, drag and lift coefficients for different shapes were measured to assess the effect of vortex trapping cavity on aerodynamic performance. Flow patterns were compared against ultraviolet dye visualizations obtained from the water tunnel experiment.

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Section: Numerical Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vortex Trapping Cavity on Airfoil: High-Order Penalized Vortex Method Numerical Simulation and Water Tunnel Experimental Investigation

2021

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“…The incorporation of renewable energy becomes more important, particularly as the economies of several nations is improving [3]. From several renewable energy sources available, biomass is considered to be the most viable option as it generates enough heat for stable functioning in comparison with the wind, solar, and hydro sources, or it is constraint by location like geothermal [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Assessment of a District Trigeneration Biomass Powered Double Organic Rankine Cycle as Primed Mover and Supported Cooling

et al. 2021

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This study presents a combined cooling, heating, and power system powered by biogas, suitable for small scale communities in remote locations. To run such a system, in order to obtain the daily life essentials of electricity, hot water, and cooling, municipal waste can be considered as an option. Furthermore, the organic Rankine cycle part of the organic Rankine cycle powered vapor compression chiller can be used in times of need for additional electric production. The system comprises a medium temperature organic Rankine cycle utilizing M-xylene as its working fluid, and the cooling was covered by an Isobutane vapor compression cycle powered by an R245fa employing organic Rankine cycle. The system analyzed was designated to provide 250 kW of electricity. The energetic and exergetic analysis was performed, considering several system design parameters. The impact of the design parameters in the prime mover has a much greater effect on the whole system. The system proposed can deliver cooling values at the rate between 9.19 and 22 kW and heating values ranging from 879 up to 1255 kW, depending on the design parameter. Furthermore, the second law efficiency of the system was found to be approximately 56% at the baseline conditions and can be increased to 64.5%.

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Wake flow evolution behind a circular cylinder with two perpendicular slits at various angles of attack

Chen

Shahsavari

Hosseini

et al. 2023

J Vis

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Evaluation of aerodynamic performance enhancement of Risø_B1 airfoil with an optimized cavity by PIV measurement

Cited by 8 publications

References 27 publications

Vortex Trapping Cavity on Airfoil: High-Order Penalized Vortex Method Numerical Simulation and Water Tunnel Experimental Investigation

Vortex Trapping Cavity on Airfoil: High-Order Penalized Vortex Method Numerical Simulation and Water Tunnel Experimental Investigation

Assessment of a District Trigeneration Biomass Powered Double Organic Rankine Cycle as Primed Mover and Supported Cooling

Wake flow evolution behind a circular cylinder with two perpendicular slits at various angles of attack

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