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2D Numerical Simulation and Sensitive Analysis of H-Darrieus Wind Turbine
Published 2018-02-01“…In order to complete this simulation, sensitivity analysis of the effective turbine parameters such as solidity factor, airfoil shape, wind velocity and shaft diameter were done. …”
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1322
A Comparison of Computational and Experimental Fluid Dynamics Studies between Scaled and Original Wing Sections, in Single-Phase and Two-Phase Flows, and Evaluation of the Suggeste...
Published 2022-02-01“…More specifically, we investigate the one-phase and two-phase flow over a typical wing section NACA 641-212 airfoil, in the commercial code Ansys Fluent. Two computational models were developed; the first model represents the original dimensions of the wing, while the second is downscaled to 23% of the original. …”
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1323
Design, Manufacture and Wind Tunnel Test of a Modular FishBAC Wing with Novel 3D Printed Skins
Published 2022-01-01“…Results show that the new design is capable of achieving the same large changes in airfoil lift coefficient (approximate <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>Δ</mo><msub><mi>C</mi><mi>L</mi></msub><mo>≈</mo><mn>0.55</mn></mrow></semantics></math></inline-formula>) with a low drag penalty seen in previous FishBAC work, but with a much simpler, practical and modular design. …”
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1324
Optimized kinematics enable both aerial and aquatic propulsion from a single three-dimensional flapping wing
Published 2018“…Flapping wings in nature demonstrate a large force envelope, with capabilities far beyond the traditional limits of static airfoil section coefficients. Puffins, murres, and other auks particularly showcase this effect, as they are able to generate both enough thrust to swim and enough lift to fly, using the same wing, purely by changing the wing motion trajectory. …”
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Physics-based machine learning and data-driven reduced-order modeling
Published 2019Get full text
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1329
Design, build and testing of an aerial rim driven fan
Published 2022“…RDF design parameters such as number of blades, airfoil profile and design tip speed ratio were investigated to determine the optimum design. …”
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1330
Impact of Solidity on the Aerodynamic Performance of Vertical Axis Wind Turbine via 2D CFD Simulation
Published 2022“…The sliding mesh method and the k-ω SST turbulence model were selected to model the rotational motion of the NACA0021 airfoil VAWT. The reliability of the simulation was first validated with the data available in the literature where a good agreement is presented. …”
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A control method for hydraulic fracturing of the hard roof with long and short boreholes
Published 2022-12-01“…The formation of cracks involves a vertical main crack and multiple extended-airfoil branch cracks which interconnect transversely and longitudinally. …”
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Implementation of Flux Limiters in Simulation of External Aerodynamic Problems on Unstructured Meshes
Published 2023-01-01“…Problems with a supersonic flow in a channel with a wedge and transonic flow over NACA0012 airfoil were selected for the examination of the limiter functions applicability. …”
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Numerical investigation on heat transfer in an advanced new leading edge impingement cooling configuration
Published 2015-12-01“…The highest heat transfer rates on the airfoil can always be found on the stagnation region of the leading edge. …”
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Single-step deep reinforcement learning for two- and three-dimensional optimal shape design
Published 2022-08-01“…Although the low number of degrees of freedom inevitably constrains the range of attainable shapes, the optimal is systematically found to perform just as well as a conventional airfoil, despite DRL starting from the ground up and having no a priori knowledge of aerodynamic concepts. …”
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Study the Effect of Winglet Height Length on the Aerodynamic Performance of Horizontal Axis Wind Turbines Using Computational Investigation
Published 2023-07-01“…The turbine has three blades with a radius of 0.36 m, and the NACA4418 airfoil blade sections were used to build the blade profile. …”
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Aerodynamic Evaluation of Flapping Wings with Leading-Edge Twisting
Published 2023-03-01“…Next, MATLAB software was used to create the 3D wing surfaces from the instantaneous stereophotography Kwon3D trajectories to fully sketch the leading-edge twisting features. The 2D airfoil cut sections at the mean aerodynamic chord at different stroke moments depict the instantaneous angles of attack to justify the aforementioned wind tunnel testing data and it was verified using a theoretical trajectory model. …”
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Reliability assessment of off-policy deep reinforcement learning: A benchmark for aerodynamics
Published 2024-01-01“…The benchmark consists in controlling an airfoil to reach a target. The problem is solved with either a low-cost low-order model or with a high-fidelity CFD approach. …”
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Surrogate-Based Design Optimization of a H-Darrieus Wind Turbine Comparing Classical Response Surface, Artificial Neural Networks, and Kriging
Published 2023-01-01“…This article sought to study the optimal geometrical parameters of a H-Darrieus vertical axis wind turbine using surrogate-based optimization with three different types of surrogate models and compared them. Airfoil chord and thickness were chosen as the design variables and respective ranges set at 0.32-0.6 m and 0.04-0.16 m. …”
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Exploring the Impact of Rapidly Actuated Control Surfaces on Drone Aerodynamics
Published 2023-07-01“…In this paper, the focus is on the dynamic effects observed from rapidly actuated 30% chord leading- or trailing-edge hinged control surfaces affixed to two flat-plate airfoils. Forces were resolved from surface pressure measurements and are augmented by PIV measurements, smoke flow visualization and analyses. …”
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Delaying the Stall of A Low-Wing Aircraft Using A Novel Powerful Vortex Generator
Published 2022-10-01“…To evaluate the concept of PVG in more realistic situations, the wing airfoil was optimized at the same three points using the adjoint method. …”
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