Results 11 to 20 of about 11,483,688 (354)
Propulsive performance of a rigid wingsail with crescent-shaped profiles
Ocean Engineering, 2023 .
Heng Zhu +4 more
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Deep reinforcement learning for propulsive performance of a flapping foil
The Physics of Fluids, 2023 While it is challenging for a traditional propulsor to achieve a wide range of force profile manipulation and propulsion efficiency, nature provides a solution for a flapping foil such as that found in birds and turtles.
Yan Bao +7 more
semanticscholar +1 more source
Acoustic and propulsion performance facility [PDF]
The Journal of the Acoustical Society of America, 1974 A unique facility has been developed at the Lockheed-Georgia Company to evaluate, simultaneously, acoustic and propulsion performance characteristics of lift augmentation systems of the type considered for V/STOL aircraft. The facility is ideally suited for concept parametric and systematic noise-reduction investigations where the relationship between ...
G. Swift, L. G. Smith
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Aerospace, 2023 A three-dimensional upwind conservation element and solution element method (CESE) in cylindrical coordinates is first developed to effectively solve the unsteady reactive Euler equations governing a hydrogen–air rotating detonation engine (RDE) with ...
Lisong Shi +5 more
semanticscholar +1 more source
AIP Advances, 2022 The propulsive wing is a new concept wing of automatic propulsion with high lift coefficients and has great application value in plant protection and forest fire control. The propulsive wing wake is a reverse Bénard–von Kármán (RBvK) vortex street, which
Jiaxin Lu +3 more
doaj +1 more source
Influence of a Deflectable Leading-Edge on a Flapping Airfoil
Aerospace, 2023 Flapping wing dynamics are of great interest in many research areas, such as bioinspired systems and aircraft aeroelasticity. The findings of the present study provide significant insight into the importance of the leading-edge dynamic incidence on the ...
Emanuel A. R. Camacho +2 more
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Study on effect of geometry on performance of pulse detonation rocket engines
Xibei Gongye Daxue Xuebao, 2021 In order to investigate the effect of the geometry on the performance of pulse detonation rocket engines under valveless self-adaptive working mode, the multi-cycle experiment was carried out on the pulse detonation rocket engines with different mixing ...
doaj +1 more source
Propulsive Performance of Morphing and Heaving Foil
Volume 5B: Ocean Engineering; Honoring Symposium for Professor Günther F. Clauss on Hydrodynamics and Ocean Engineering, 2022 Abstract Biological locomotion, observed in the flexible wings of birds and insects, bodies and fins of aquatic mammals and fishes, consists of their ability to morph the wings/fins. The morphing capability holds significance in the ability of fishes to swim upstream without spending too much energy and that of birds to glide for ...
Singh, Pragalbh Dev +3 more
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Propulsive performance of plunging airfoils in biplane configuration
Physics of Fluids, 2022 Biplane configuration of pure plunging airfoils is investigated in terms of vortex dynamics both experimentally and numerically by utilizing particle image velocimetry and unstructured finite volume solver of incompressible unsteady Navier–Stokes equations.
S. B. Yucel, M. Sahin, M. F. Unal
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Scaling laws for the propulsive performance of a purely pitching foil in ground effect [PDF]
Journal of Fluid Mechanics, 2020 Scaling laws for the thrust production and power consumption of a purely pitching hydrofoil in ground effect are presented. For the first time, ground-effect scaling laws based on physical insights capture the propulsive performance over a wide range of ...
A. Mivehchi +4 more
semanticscholar +1 more source