Results 31 to 40 of about 43,945 (204)

Trailing Edge Noise Reduction by Passive and Active Flow Controls [PDF]

open access: yes, 2014
This paper presents the results on the use of porous metal foams (passive control) and dielectric barrier surface plasma actuations (active control) for the reduction of vortex shedding tonal noises from the nonflat plate type trailing edge serration in ...
Chong T. P.   +5 more
core   +1 more source

Insights into Vortex Shedding with Data Analysis

open access: yesJournal of Fluid Science and Technology, 2009
Unsteady, three-dimensional characteristics of vortex shedding were studied with self-made MEMS sensors situated spanwisely on a circular cylinder subjected to uniform incoming flow. Firstly, verification on the reliability of the MEMS sensor signals was
Jiun-Jih MIAU, J. K. TU, T. W. LIAO
doaj   +1 more source

Von K\'arm\'an vortex street in a Bose-Einstein condensate

open access: yes, 2010
Vortex shedding from an obstacle potential moving in a Bose-Einstein condensate is investigated. Long-lived alternately aligned vortex pairs are found to form in the wake, as for the von K\'arm\'an vortex street in classical viscous fluids.
H. Bénard   +5 more
core   +1 more source

Trailing vortices in a free-surface flow [PDF]

open access: yes, 2002
The free-surface effect on two-dimensional flow structures, especially on the trailing vortices, is investigated numerically in this paper. The solution procedure employs a higher-order semi-implicit projection method.
Chen, T, Chwang, ATY
core   +1 more source

Global modes and nonlinear analysis of inverted-flag flapping [PDF]

open access: yes, 2017
An inverted flag has its trailing edge clamped and exhibits dynamics distinct from that of a conventional flag, whose leading edge is restrained. We perform nonlinear simulations and a global stability analysis of the inverted-flag system for a range of ...
Colonius, Tim   +2 more
core   +2 more sources

Research on the Unsteady Flow and Vortex Characteristics of Cavitation at the Tongue in Centrifugal Pump [PDF]

open access: yesJournal of Applied Fluid Mechanics
In order to study the unsteady flow and vortex characteristics of tongue cavitation, numerical calculation is carried out for the whole flow channel given different conditions. Then, the calculation results are verified experimentally.
Z. Y. Luo   +5 more
doaj   +1 more source

The essence of generating vortex-within-a-vortex structures behind forked caudal fins

open access: yesAIP Advances, 2022
This work focuses on vortex-within-a-vortex (VV) structures behind three different shapes of forked caudal fin with a heaving-pitching motion. The results show that the synchronization of trailing-edge vortex separation and the shedding of the leading ...
Zhongying Xiong
doaj   +1 more source

Power Control Optimization of an Underwater Piezoelectric Energy Harvester [PDF]

open access: yes, 2018
Over the past few years, it has been established that vibration energy harvesters with intentionally designed components can be used for frequency bandwidth enhancement under excitation for sufficiently high vibration amplitudes.
Aramendia Iradi, Iñigo   +4 more
core   +3 more sources

Effects of swirl numbers on the unsteady characteristics of pilot flame in a triple-swirler staged combustor

open access: yesCase Studies in Thermal Engineering, 2023
This paper studies the effects of the inner and outer pilot swirlers on the flame structures and thermo-acoustic instabilities in the triple-swirler staged combustors under various inner and outer pilot swirl numbers.
Tao Zhou   +5 more
doaj   +1 more source

Flow over a cylinder subjected to combined translational and rotational oscillations [PDF]

open access: yes, 2012
The experimental research reported here employs particle image velocimetry to extend the study of Nazarinia et al. (2009a), recording detailed vorticity fields in the near-wake of a circular cylinder undergoing combined translational and rotational ...
Lo Jacono, David   +3 more
core   +2 more sources

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