Results 1 to 10 of about 187,061 (298)
How Non-Uniform Stiffness Affects the Propulsion Performance of a Biomimetic Robotic Fish [PDF]
Biomimetics, 2022 Live fish in nature exhibit various stiffness characteristics. The anguilliform swimmer, like eels, has a relatively flexible body, while the thunniform swimmer, like the swordfishes, has a much stiffer body.
Changzhen Zheng +5 more
doaj +2 more sources
Hydrodynamic Characteristics of an Electric Eel-Like Undulating Fin [PDF]
Journal of Applied Fluid Mechanics, 2023 Taking the electric eel as a bionic object, a long undulatory fin is designed. The turbulent model standard k-ε is used to solve the N‒S equation of a three-dimensional unsteady incompressible fluid. The hydrodynamic characteristics of the undulatory fin
M. Zhang, C. Wang, Y. Su
doaj +1 more source
Experimental study of the wake interaction between two vertical axis wind turbines
Wind Energy, 2023 Wakes and wake interactions in wind turbine arrays diminish energy output and raise the risk of structural fatigue; hence, comprehending the features of rotor–wake interactions is of practical relevance.
Ming Huang +3 more
doaj +1 more source
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
doaj +1 more source
On the wake deflection of vertical axis wind turbines by pitched blades
Wind Energy, 2023 Wake losses are a critical consideration in wind farm design. The ability to steer and deform wakes can result in increased wind farm power density and reduced energy costs and can be used to optimize wind farm designs.
Ming Huang +2 more
doaj +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
openaire +1 more source
Parametrisation of the orographic enhancement of precipitation and deposition in a long-term, long-range transport model [PDF]
Annales Geophysicae, 2000 Orographic enhancement of wet deposition arising from the 'seeder-feeder' effect is, by necessity, highly parametrised in long-range transport models of acid deposition that are long-term (i.e.
D. S. Lee +3 more
doaj +1 more source
Aerospace, 2020 A unified approach to aircraft mission performance assessment is presented in this work. It provides a detailed and flexible formulation to simulate a complete commercial aviation mission.
Sam de Wringer +2 more
doaj +1 more source
Journal of Marine Science and Engineering, 2023 Submarines with pumpjet propulsors have recently been used in many countries to improve their propulsion and noise performance. The pumpjet has the advantage of improving noise and cavitation performance by increasing the pressure inside the duct, and it
Jin-Wook Kim +5 more
doaj +1 more source
Aerospace, 2023 Fuel injection and mixing affect the characteristics of detonation initiation and propagation, as well as the propulsion performance of rotating detonation engine (RDE). A study on the injector is carried out in the present investigation.
In-Hoi Koo +5 more
doaj +1 more source