Showing 481 - 500 results of 1,473 for search '"Airfoil"', query time: 0.09s Refine Results
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    Cell-Set Modelling for a Microtab Implementation on a DU91W(2)250 Airfoil by Alejandro Ballesteros-Coll, Unai Fernandez-Gamiz, Iñigo Aramendia, Ekaitz Zulueta, José Antonio Ramos-Hernanz

    Published 2020-12-01
    “…Computational simulations were carried out for fully mesh and cell-set models: MT lengths were set at 1.0%, 1.5% and 2.0% of the airfoil chord length (c) and the MTs were placed at 93% and 95% of c from the leading edge of the airfoil. …”
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  4. 484
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    Comparative Study of Dynamic Stall under Pitch Oscillation and Oscillating Freestream on Wind Turbine Airfoil and Blade by Chengyong Zhu, Tongguang Wang

    Published 2018-07-01
    “…During upstroke, PO results in a positive effective airfoil camber, while OF has an additional negative effective airfoil camber, and yet in contrast during downstroke, PO decreases the effective camber, while OF increases the effective camber. …”
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    Assessment of Turbulence Models for Unsteady Separated Flows Past an Oscillating NACA 0015 Airfoil in Deep Stall by S. Ouchene, A. Smaili, H. Fellouah

    Published 2023-05-01
    “…This paper provides 2D Computational Fluid Dynamics (CFD) investigations, using OpenFOAM package, of the unsteady separated fully turbulent flows past a NACA 0015 airfoil undergoing sinusoidal pitching motion about its quarter-chord axis in deep stall regime at a reduced frequency of 0.1, a free stream Mach number of 0.278, and at a Reynolds number, based on the airfoil chord length, , of . …”
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    Study on design of low Reynolds number reflexed airfoil for solar-powered UAV in flying wing configuration by WANG Kelei, ZHOU Zhou, GUO Jiahao, XU De

    Published 2022-06-01
    “…Firstly, the accuracy and reliability of both quasi-steady and unsteady numerical methods to simulate the LRN transition flow and the stall separated flow at large angles of attack (AOA) are validated by an airfoil case study at specified Reynolds numbers; Secondly, the LRN reflexed air-foil optimization design framework is established by using the CST parameterization method, the multi-island genetic algorithm (MIGA), and the kriging surrogate model; Lastly, the LRN reflexed airfoil optimization study is conducted by using the NACA 8-H-12 reflexed airfoil as the baseline airfoil, it shows that both the lift-to-drag performance and the stall characteristics of the designed airfoil is significantly improved when compared with the baseline airfoil, which are quite beneficial for the small hand-launched solar-powered UAV in flying wing configuration to realize the hand-launched take off and the high-lift long-endurance flight.…”
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  12. 492
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    Numerical calculations on the flow near the plunging airfoil and relation with the flying or swimming animals, birds, fish and insects by Masahide NAKAMURA, Yuki MURASHITA, Orie TAMURA

    Published 2015-10-01
    “…We investigated the influence of the airfoil geometry on the performance of the plunging airfoil numerically. …”
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  14. 494

    Controlling the Chaotic Motions of an Airfoil with a Nonlinear Stiffness Using Closed-Loop Harmonic Parametric Excitation by Robert Bruce Alstrom

    Published 2020-09-01
    “…The purpose of this research is to conduct a preliminary investigation into the possibility of suppressing the flutter and post-flutter (chaotic) responses of a two-dimensional self-excited airfoil with a cubic nonlinear stiffness (in torsion) and linear viscous damping via closed-loop harmonic parametric excitation. …”
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    Aerodynamic Shape Optimization of a NACA0018 Airfoil Using Adjoint Method and Gradient-Based Optimizer by van Stratan G.S.M., Roy Sukanta, San Yam Ke

    Published 2023-01-01
    “…The purpose of this study is to demonstrate the suitability and efficacy of the adjoint method on the aerodynamic shape optimization on a simple symmetrical airfoil NACA0018 at low Reynolds number for wind turbine application. …”
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    Experimental Investigation of the Effect of Bio-Inspired Wavy Leading-Edges on Aerodynamic Performance and Flow Topologies of the Airfoil by Hai Du, Hao Jiang, Zhangyi Yang, Haoyang Xia, Shuo Chen, Jifei Wu

    Published 2024-02-01
    “…The characteristic of delayed airfoil stalls caused by the bio-inspired Wavy Leading-Edges (WLEs) has attracted extensive attention. …”
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  20. 500

    Numerical investigation of the influences of ridge ice parameters on lift and drag coefficients of airfoils through design of experiments by Chengyi Zheng, Zheyan Jin, Qiaotian Dong, Zhigang Yang

    Published 2024-01-01
    “…In addition, the leading-edge radii of these three airfoils, as well as the shapes of the upper and lower surfaces, could alter the influences of design parameters on C L and C D .…”
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