Results 31 to 40 of about 75,987 (260)

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

Hangkong 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

Leading-Edge Vortex Characteristics of Low-Aspect-Ratio Sweptback Plates at Low Reynolds Number

Applied Sciences, 2021
A sweptback angle can directly regulate a leading-edge vortex on various aerodynamic devices as well as on the wings of biological flyers, but the effect of a sweptback angle has not yet been sufficiently investigated.
Jong-Seob Han, Christian Breitsamter
doaj   +1 more source

Rotor blade design and dynamic characteristics analysis of unmanned helicopter

Hangkong 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

Aerodynamic Performance of Micro Aerial Wing Structures at Low Reynolds Number [PDF]

INCAS Bulletin, 2019
Corrugations are folds on a surface as found on wings of dragon fly insects. Although they fly at relatively lower altitudes its wings are adapted for better aerodynamic and aero-elastic characteristics. In the present work, three airfoil geometries were
Y. D. DWIVEDI, Vasishta BHARGAVA, P. M. V. RAO, Donepudi JAGADEESH   +3 more
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Numerical Validation of a Multi-Dimensional Similarity Law for Scaled STOVL Aircraft Models

Aerospace
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, Mingyu Li, Xiance Wang, Yanting Song, Bingbing Tang, Lianhe Zhang, Shuai Yin, Jianfeng Tan   +7 more
doaj   +1 more source

Low Reynolds Number Flow Around Tori of Different Slenderness Γ

Applied Sciences, 2017
We present the results of axisymmetric and three-dimensional numerical simulations of the flow around a torus in the low Reynolds number regime [ 10 − 2 ; 3 × 10 3 ] and aspect-ratio 0 < Γ = 2 a / R ≤ 2 (core diameter ...
Werner M. J. Lazeroms, Marco D. de Tullio, Nicola De Santis, Roberto Pizzoferrato, Roberto Verzicco   +4 more
doaj   +1 more source

Low Reynolds Number Propeller Slipstream Interference with Wing Aerodynamic Characteristics

Hangkong gongcheng jinzhan, 2018
Detailed research for wing aerodynamic characteristics of propeller slipstream at low Reynolds number could contribute the mechanism study of low speed near space flow, and provide reliable aerodynamic results.
Sun Kaijun, Bao Xiaoxiang, Fu Yiwei
doaj   +1 more source

Local vibrations and lift performance of low Reynolds number airfoil

Propulsion and Power Research, 2017
The 2D incompressible Navier-Stokes equations are solved based on the finite volume method and dynamic mesh technique is used to carry out partial fluid structure interaction.
TariqAmin Khan, Wei Li, Jiazhong Zhang, Tom I-P. Shih   +3 more
doaj   +1 more source

Viscoelasticity-Induced Instability in Plane Couette Flow at Very Low Reynolds Number

Fluids, 2022
Elasto-inertial turbulence (EIT), a new turbulent state found in polymer solutions with viscoelastic properties, is associated with drag-reduced turbulence.
Tomohiro Nimura, Takahiro Tsukahara
doaj   +1 more source

Wing Efficiency Enhancement at Low Reynolds Number

Aerospace
The aerodynamic performance of wings degrades severely at low Reynolds number; lift often becomes non-linear, while drag increases significantly, caused by large extents of separation.
Lance W. Traub
doaj   +1 more source