Results 31 to 40 of about 162,037 (197)
Drag Characteristics and Reduction Test for Hub of Coaxial-rotor Helicopter
Hangkong gongcheng jinzhan, 2020 The drag of coaxial helicopter hub accounts is more than 50% of the total helicopter's waste drag, so it is necessary to research the drag characteristics and reduction design of the hub. Wind tunnel test is carried out for a coaxial helicopter hub model,
LONG Haibin, WU Yuping
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Computational Aerodynamics for Aircraft Design [PDF]
Science, 1989 This article outlines some of the principal issues in the development of numerical methods for the prediction of flows over aircraft and their use in the design process. These include the choice of an appropriate mathematical model, the design of shock-capturing algorithms, the treatment of complex geometric configurations, and shape modifications to ...
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Dynamic Stall Control on the Wind Turbine Airfoil via a Co-Flow Jet
Energies, 2016 Dynamic stall control of a S809 airfoil is numerically investigated by implementing a co-flow jet (CFJ). The numerical methods of the solver are validated by comparing results with the baseline experiment as well as a NACA 6415-based CFJ experiment ...
He-Yong Xu +2 more
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Mathematics, 2021 This study presents the magnetized hybrid nanofluid flow with heat source/sink over an exponentially stretching/shrinking sheet. Slip conditions are implemented to analyze the hybrid nanofluid flow for both slip and no-slip conditions.
Abdul Samad Khan, He-Yong Xu, Waris Khan
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Closed-loop Flow Control Method Based on Deep Reinforcement Learning using a Co-flow Jet [PDF]
Journal of Applied Fluid MechanicsA closed-loop control framework is developed for the co-flow jet (CFJ) airfoil by combining the numerical flow field environment of a CFJ0012 airfoil with a deep reinforcement learning (DRL) module called tensorforce integrated in Python.
Y. R. Zhao, H. Y. Xu, Z. Y. Xie
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Aerodynamic Design via Control Theory [PDF]
Journal of Scientific Computing, 1988 The purpose of this paper is to propose that there are benefits in regarding the design problem as a control problem in which the control is the shape of the boundary. A variety of alternative formulations of the design problem can then be treated systematically by using the mathematical theory for control of systems governed by partial differential ...
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Numerical investigation of non-planarity and relative motion for bionic slotted wings
AIP Advances, 2023 Bird wings have split primary feathers that extend out from the wing surface. This structure is called the wingtip slot, which is recognized as a product of bird evolution to improve flight performance. In this paper, numerical simulations based on RANS (
Dan Liu +4 more
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Rod–Airfoil Interaction Noise Reduction Using Gradient Distributed Porous Leading Edges
Applied Sciences, 2022 Rod–airfoil interaction noise is a major concern in several practical industrial and aeronautical applications. In this study, we constructed bio-inspired gradient distributed porous leading edges to reduce rod–airfoil interaction noise. Noise radiations
Yong Wang +4 more
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High Specification Offshore Blades: Work Package: 1B: Blades Design [PDF]
, 2008 This report outlines the current state of the art in offshore wind turbine blade aerodynamic design, along with the key technical limitations and possible technologies which may improve the aerodynamic design of blades and turbine rotors in the future ...
Brown, Richard +3 more
core
Study on Aerodynamic Shape Optimization for Wing of Business Jet
Hangkong gongcheng jinzhan, 2022 With the development of world economy and trade,the medium business jets are more favored by customers. In order to further improve the general aerodynamic performance of high-speed turbofan business jet,the optimization methods based on the full ...
MA Xiaoyong +6 more
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