Results 31 to 40 of about 12,489,898 (339)

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

Review of the Co-flow Jet Flow Control Method

open access: yesHangkong gongcheng jinzhan, 2022
The co-flow jet(CFJ)is a new concept flow control method based on blowing and suction technology.Since it was proposed,it has gradually attracted extensive attention.This paper reviews the basic principles,concepts,research methods and progress of CFJ ...
XU Heyong, MA Chengyu
doaj   +1 more source

Application of surrogate models to stability analysis and transition prediction in hypersonic flows

open access: yesAdvances in Aerodynamics, 2022
To increase the efficiency and robustness of stability-based transition prediction in flow simulations, simplified methods are introduced to substitute direct stability analyses for rapid disturbance growth prediction.
Han Nie   +4 more
doaj   +1 more source

Aeolian Towers: Designing Aerodynamics

open access: yesIOP Conference Series: Earth and Environmental Science, 2020
Abstract Acknowledging the necessity of designing structures that comply with environmental factors, the main objective of the current project is the morphological investigation of a sustainable dual-tower complex. Considering the force of wind as a basic design parameter, the importance of every design decision is evaluated by ...
S Vergopoulos   +3 more
openaire   +1 more source

State-of-the-art in aerodynamic shape optimisation methods [PDF]

open access: yes, 2018
Aerodynamic optimisation has become an indispensable component for any aerodynamic design over the past 60 years, with applications to aircraft, cars, trains, bridges, wind turbines, internal pipe flows, and cavities, among others, and is thus relevant ...
Skinner, S.N., Zare-Behtash, H.
core   +1 more source

Investigation of propeller slipstream effects on lateral and directional static stability of transport aircraft

open access: yesEngineering Applications of Computational Fluid Mechanics, 2022
The aerodynamic characteristics of turboprop aircraft are greatly affected by the running propellers. In this paper, propeller slipstream effects on the static lateral-directional stability characteristics of a typical twin-engine turboprop aircraft with
Shuai Zhao   +4 more
doaj   +1 more source

Dynamic Stall Control on the Wind Turbine Airfoil via a Co-Flow Jet

open access: yesEnergies, 2016
Dynamic stall control of a S809 airfoil is numerically investigated by implementing a co-flow jet (CFJ). The numerical methods of the solver are validated by comparing results with the baseline experiment as well as a NACA 6415-based CFJ experiment ...
He-Yong Xu   +2 more
doaj   +1 more source

Drag Characteristics and Reduction Test for Hub of Coaxial-rotor Helicopter

open access: yesHangkong gongcheng jinzhan, 2020
The drag of coaxial helicopter hub accounts is more than 50% of the total helicopter's waste drag, so it is necessary to research the drag characteristics and reduction design of the hub. Wind tunnel test is carried out for a coaxial helicopter hub model,
LONG Haibin, WU Yuping
doaj   +1 more source

Computational Aerodynamics for Aircraft Design [PDF]

open access: yesScience, 1989
This article outlines some of the principal issues in the development of numerical methods for the prediction of flows over aircraft and their use in the design process. These include the choice of an appropriate mathematical model, the design of shock-capturing algorithms, the treatment of complex geometric configurations, and shape modifications to ...
openaire   +2 more sources

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