Results 21 to 30 of about 9,345,647 (234)

Review of the Study on High-angle-of-attack Flight Problems of Aircraft

open access: yesHangkong gongcheng jinzhan, 2022
The close combat in air battle is still inevitable in future.The accurate and agile nose-pointing capability at high-angle-of-attack is still essential and significant for fighter to survive and gain air superiority.According to the high-angle-of-attack ...
ZHANG Zijun   +3 more
doaj   +1 more source

Robust aerodynamic design of variable speed wind turbine rotors [PDF]

open access: yes, 2012
This study focuses on the robust aerodynamic design of the bladed rotor of small horizontal axis wind turbines. The optimization process also considers the effects of manufacturing and assembly tolerances on the yearly energy production.
Vasile, Massimiliano   +2 more
core   +3 more sources

Numerical simulation study on dynamic stall of airfoil controlled by combined blow-suction

open access: yesHangkong gongcheng jinzhan, 2023
One of the key problems to improve the aerodynamic characteristics of airfoil is to solve the dynamic stall.This paper presents a method to control the dynamic stall of airfoil by using the combination of leading-edge suction and trailing edge suction ...
JIA Tianhao   +3 more
doaj   +1 more source

An improved WENO-Z scheme with symmetry-preserving mapping

open access: yesAdvances in Aerodynamics, 2020
Since the classical weighted essentially non-oscillatory (WENO) scheme is proposed, various improved versions have been developed, and a typical one is the WENO-Z scheme.
Zheng Hong, Zhengyin Ye, Kun Ye
doaj   +1 more source

Multi-disciplinary design of wings for transport aircraft operating at high subsonic speed [PDF]

open access: yes, 1995
In this thesis a methodology for designing wings for transport aircraft operating at high subsonic speed is investigated. Several methods are studied, including more accurate methods such as the computational methods. These are used as an addition to
Djafri, Demil Y.
core   +7 more sources

Inflatable Leading Edge-Based Dynamic Stall Control considering Fluid-Structure Interaction

open access: yesInternational Journal of Aerospace Engineering, 2020
The inflatable leading edge (ILE) is explored as a dynamic stall control concept. A fluid-structure interaction (FSI) numerical method for the elastic membrane structure is constructed based on unsteady Reynolds-averaged Navier-Stokes (URANS) and a mass ...
Shi-Long Xing   +3 more
doaj   +1 more source

Side force control on slender body by self-excited oscillation flag

open access: yesTheoretical and Applied Mechanics Letters, 2016
Strong asymmetrical vortices appear on the leeward of slender body at high angles of attack, which has very unfavorable effect on the stability and control of the aircraft. A method is developed to control the side force of slender body at high angles of
Jian Zhai   +5 more
doaj   +1 more source

Multipoint high-fidelity CFD-based aerodynamic shape optimization of a 10 MW wind turbine [PDF]

open access: yesWind Energy Science, 2019
The wind energy industry relies heavily on computational fluid dynamics (CFD) to analyze new turbine designs. To utilize CFD earlier in the design process, where lower-fidelity methods such as blade element momentum (BEM) are more common, requires the
M. H. Aa. Madsen   +3 more
doaj   +1 more source

Optimization of a Twistable Hovering Flapping Wing Inspired by Giant Hummingbirds Using the Unsteady Blade Element Theory

open access: yesApplied Sciences, 2023
Due to the complexity of tailoring the wing flexibility and selecting favorable kinematics, the design of flapping wings is a considerably challenging problem.
Yuanbo Dong   +3 more
doaj   +1 more source

Numerical Investigation of Performance Enhancement of the S809 Airfoil and Phase VI Wind Turbine Blade Using Co-Flow Jet Technology

open access: yesEnergies, 2021
Making full use of wind energy can effectively alleviate the global energy shortage and environment contamination problems. Nevertheless, how to significantly improve the performance of the wind turbine airfoil and blade is a crucial issue.
Shunlei Zhang, Xudong Yang, Bifeng Song
doaj   +1 more source

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