Results 21 to 30 of about 542,523 (285)

Performance Investigation of Savonius Hydrokinetic Rotor with Novel Blades Featuring Surface Square Collars and Rectangular Edge Waves [PDF]

Journal of Applied Fluid Mechanics
The current work's objective is to investigate how the Savonius rotor performs in relation to the surface square collars and rectangular waves. The experimental study was carried out for three different blade profiles: conventional semicircular blade ...
J. S. Patel, V. Rathod, V. Patel
doaj   +1 more source

Dynamic Modeling and Vibration Characteristics for a High-Speed Aero-Engine Rotor with Blade Off

Applied Sciences, 2021
Blade off that occurs during operation will generate a sudden imbalance excitation and make the rotor become inertially asymmetric, which leads to large instantaneous impact load and induces more complex rotor dynamic phenomena.
Longkai Wang, Yijun Yin, Ailun Wang, Xing Heng, Miao Jin   +4 more
doaj   +1 more source

Effects of blade section on performance of butterfly wind turbines as double-blade VAWTs

Journal of Fluid Science and Technology, 2015
A butterfly wind turbine (BWT) is a kind of vertical axis wind turbine (VAWT) with closed-loop blades. These blades form a double-blade structure, which is expected to improve self-starting properties and reduce energy costs because of their simple ...
Yutaka HARA, Takahiro SUMI, Takanori EMI, Mutsuko YOKOYAMA, Hiromichi AKIMOTO, Takafumi KAWAMURA, Takuju NAKAMURA   +6 more
doaj   +1 more source

Influence of blade aerodynamic model on prediction of helicopter rotor aeroacoustic signatures [PDF]

, 2011
Brown’s vorticity transport model has been used to investigate how the local blade aerodynamic model influences the quality of the prediction of the high-frequency airloads associated with blade–vortex interactions, and thus the accuracy with which the ...
Boyd D. D., Farassat F., Kelly M. E., Kelly M. E., Kelly M. E., Lim J. W., Lim J. W., Mary E. Kelly, Pengel K., Richard E. Brown, Schneider O., Toro E. F., van der Wall B. G., Whitehouse G., Yu Y. H.   +14 more
core   +1 more source

Simulation and Experimental Study on Rotor System Dynamic Analysis with the Blade-Coating Rubbing Faults

Shock and Vibration, 2021
In the modern turbo-machinery, reducing the clearance between the blade tip and casing inner face is an effective method to improve the power performance, but the clearance reduction leads to increased risk of blade-casing rubbing. In this paper, a blade-
Xin Lu, Jie Tang, Liwen Wang
doaj   +1 more source

CALCULATED RESEARCH OF INFLUENCE OF HELICOPTER MAIN ROTORS GEOMETRY ON THE EFFICIENCY IN HOVER MODE BASED ON THE NONLINEAR VORTEX MODEL

Научный вестник МГТУ ГА, 2018
The efficiency of the helicopter main rotor in the hover mode is very important, because this mode essentially determines the performance characteristics of the helicopter.
Y. M. Ignatkin, P. V. Makeev, A. I. Shomov   +2 more
doaj   +1 more source

Hydrodynamic Performance Assessment of Selected Hydrokinetic Turbine Blade Sections in River Oyun, North-Central Nigeria [PDF]

Journal of Renewable Energy and Environment
The hydrodynamic performance of lift-based hydrokinetic turbine rotors is typically dependent on the rotor blade sections, or the profile of the hydrofoil used.
Laniyi Ladokun, Mustapha Saba, Daniel Ita   +2 more
doaj   +1 more source

Investigation on the Mechanism of Blade Tip Recess Improving the Aerodynamic Performance of Transonic Axial Flow Compressor

Journal of Applied Fluid Mechanics, 2021
The development of high-performance aero engines put forward higher performance requirements for compressor components, and the improvement of aerodynamic performance of compressors has important engineering application value.
S. Yan, W. L. Chu, W. Liu, Y. Li, J. Yang, W. Zhao   +5 more
doaj  

Geometry Design of Coaxial Rigid Rotor in High-Speed Forward Flight

International Journal of Aerospace Engineering, 2020
The aerodynamic performance analysis and blade planform design of a coaxial rigid rotor in forward flight were carried out utilizing CFD solver CLORNS. Firstly, the forward flow field characteristics of the coaxial rotor were analyzed.
Bo Wang, Xin Yuan, Qi-jun Zhao, Zheng Zhu   +3 more
doaj   +1 more source

Constructive layout for small rotor of straight-flow rotary ripper

Вестник СибАДИ, 2023
Introduction. The problem of accelerating and cheapening the construction of roads without reducing their quality can be solved by creating a complex of continuous units.
V. A. Nikolaev
doaj   +1 more source