Results 21 to 30 of about 10,926,215 (298)

Plunging Airfoil: Reynolds Number and Angle of Attack Effects

open access: yesAerospace, 2021
Natural flight has consistently been the wellspring of many creative minds, yet recreating the propulsive systems of natural flyers is quite hard and challenging.
Emanuel A. R. Camacho   +3 more
doaj   +1 more source

Reynolds number calculation and applications for curved wall jets [PDF]

open access: yesINCAS Bulletin, 2014
The current paper refers to the preliminary estimation of the Reynolds number for curved wall jets. This, in turn, can be a useful tool for controlling the boundary layer mesh size near a generic curved wall which is wetted by a thin, attached jet.
Valeriu DRAGAN
doaj   +1 more source

Reynolds-number dependence of turbulence enhancement on collision growth [PDF]

open access: yesAtmospheric Chemistry and Physics, 2016
This study investigates the Reynolds-number dependence of turbulence enhancement on the collision growth of cloud droplets. The Onishi turbulent coagulation kernel proposed in Onishi et al.
R. Onishi, A. Seifert
doaj   +1 more source

Analysis of low Reynolds number flow past Gurney flap [PDF]

open access: yesINCAS Bulletin, 2010
The trailing edge region of a single element wing fitted with Gurney flap at low Reynoldsnumbers has been studied.The complex flow separation phenomena on airfoils with Gurney flap at low Reynolds numbershave some specific features as the separation on ...
Ion MĂLĂEL, Horia DUMITRESCU
doaj   +1 more source

Geometrically Nonlinear Static Analysis of High-Aspect-Ratio Truss-Braced Wing

open access: yesEngineering Proceedings
Truss-braced wings (TBWs) feature higher aspect ratios with a lighter weight and lower bending moment than conventional wings. These wings show significant potential for performance improvements in terms of fuel efficiency.
Yanxin Huang, Jinchi Chen, Qingyuan Ma
doaj   +1 more source

Low Reynolds Number Rotor Blade Aerodynamic Analysis

open access: yesMATEC Web of Conferences, 2019
Maintaining a steady hover flight in a rotorcraft usually requires high energy input. The aim of the paper is to prove that it is possible to vastly reduce energy use in a rotorcraft by reducing the disc loading.
Tulwin Tytus
doaj   +1 more source

Design of a control system for a 1.5 m diameter coaxial rigid rotor model

open access: yesHangkong gongcheng jinzhan
As a key equipment for rotor wind tunnel testing, the design specifications and control accuracy of the rotor test bench directly determine the testing accuracy and effectiveness of the rotor wind tunnel testing.
LIU Shi, SHAO Tianshuang, LIU Xiangnan
doaj   +1 more source

Rotor blade design and dynamic characteristics analysis of unmanned helicopter

open access: yesHangkong gongcheng jinzhan
The widespread application of composite materials in blades also makes the force and stiffness characteristics of blades more complex than traditional blades.
GAO Hongbo
doaj   +1 more source

Numerical Validation of a Multi-Dimensional Similarity Law for Scaled STOVL Aircraft Models

open access: yesAerospace
The complex jet-ground interactions of Short Take-off and Vertical Landing (STOVL) aircraft are critical to flight safety and performance, yet studying them with traditional full-scale wind tunnel tests is prohibitively expensive and time-consuming ...
Shengguan Xu   +7 more
doaj   +1 more source

Laminar-to-Turbulence Transition Revealed Through a Reynolds Number Equivalence

open access: yesEngineering, 2019
Flow transition from laminar to turbulent mode (and vice versa)—that is, the initiation of turbulence—is one of the most important research subjects in the history of engineering.
Xiao Dong Chen
doaj   +1 more source

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