Results 11 to 20 of about 3,507,747 (248)

Numerical Study on Vortical Flow Structure and Performance Enhancement of Centrifugal Compressor Impeller

open access: yesApplied Sciences, 2022
The performance and efficiency of a centrifugal compressor are usually affected by the highly complex 3-dimensional flow structures which develop in the flow field of the compressor.
Seongbin Hong   +2 more
doaj   +1 more source

A Rotary Wing System for Micro Air Vehicle Applications. Part 1 [PDF]

open access: yesINCAS Bulletin, 2011
The goal of the paper is to propose a new type of ornithopter that avoids the mechanical difficulties of a flapping system. It uses a modified design of a cycloidal propulsor.
Valentin BUTOESCU
doaj   +1 more source

The Leading-Edge Structure Based on Geometric Bionics Affects the Transient Cavitating Flow and Vortex Evolution of Hydrofoils

open access: yesFrontiers in Energy Research, 2022
A hydrofoil is a fundamental structure in fluid machinery, and it is widely applied to the fields of propellers, blades of axial flow pumps and underwater machinery.
Hao Yan   +4 more
doaj   +1 more source

Numerical Investigation of a Dynamic Stall on a Single Rotating Blade

open access: yesAerospace, 2021
Dynamic stall is a phenomenon on the retreating blade of a helicopter which can lead to excessive control loads. In order to understand dynamic stall and fill the gap between the investigations on pitching wings and full helicopter rotor blades, a ...
Yin Ruan, Manfred Hajek
doaj   +1 more source

Application of digital particle image velocimetry to insect aerodynamics: measurement of the leading-edge vortex and near wake of a Hawkmoth [PDF]

open access: yes, 2007
Some insects use leading-edge vortices to generate high lift forces, as has been inferred from qualitative smoke visualisations of the flow around their wings.
Taylor, Graham K.   +3 more
core   +2 more sources

Effect of leading-edge tubercles on the flow over low-aspect-ratio wings at low Reynolds number

open access: yesTheoretical and Applied Mechanics Letters, 2023
Two-dimensional time-resolved particle image velocimetry (TR-PIV) and stereographic particle image velocimetry (SPIV) techniques were used to investigate the effect of leading-edge tubercles on the flow over low-aspect-ratio wing models.
Pengxin Yang, Yichen Zhu, Jinjun Wang
doaj   +1 more source

Formation of the leading-edge vortex and spanwise flow on an insect-like flapping-wing throughout a flapping half cycle [PDF]

open access: yes, 2013
This paper presents an experimental investigation of the evolution of the leading-edge vortex and spanwise flow generated by an insect-like flapping-wing at a Reynolds number relevant to flapping-wing micro air vehicles (FMAVs) (Re = ~15,000 ...
Knowles, Kevin, Phillips, Nathan
core   +1 more source

Leading-Edge Vortex Lift (LEVL) Sample Probe for Venusian Atmosphere

open access: yesAerospace, 2022
Can a small, lightweight, free-falling sample probe be slowed enough in the Venusian atmosphere to run a 10 min microelectromechanical systems (MEMS) ion gas micro spectrometer, without adding a propulsion systems or explosives and parachutes to the ...
Christopher Isaac, Nick Jones
doaj   +1 more source

Numerical Studies on the Effect of Leading Edge Tubercles on a Low-Pressure Turbine Cascade

open access: yesEnergies, 2023
The influence of the bionic leading edge tubercles on the aerodynamic performance of a high-speed low-pressure turbine has been numerically studied. Nine different tubercle configurations were designed to reduce the loss of the cascade at high Mach and ...
Wenhua Duan   +3 more
doaj   +1 more source

Leading-Edge Roughness Affecting Diamond-Wing Aerodynamic Characteristics

open access: yesAerospace, 2018
Diamond wing configurations for low signature vehicles have been studied in recent years. Yet, despite numerous research on highly swept, sharp edged wings, little research on aerodynamics of semi-slender wings with blunt leading-edges exists. This paper
Andrei Buzica   +3 more
doaj   +1 more source

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