Results 21 to 30 of about 116,681 (302)

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

Aerodynamic Exploration for Tandem Wings with Smooth or Corrugated Surfaces at Low Reynolds Number

open access: yesAerospace, 2023
Skin corrugation and tandem configuration are two distinct features that characterize the flow around dragonfly wings. In contrast to the smooth airfoil and single pair of wings of conventional airplanes, corrugated surfaces and tandem wings influence ...
Qing Zhang, Rongrong Xue, Heng Li
doaj   +1 more source

Lift Enhancement for Low-Aspect-Ratio Wings with Periodic Excitation [PDF]

open access: yes, 2010
In an effort to enhance lift on low-aspect-ratio rectangular flat-plate wings in low-Reynolds-number post-stall flows, periodic injection of momentum is considered along the trailing edge in this numerical study.
Colonius, Tim   +3 more
core   +1 more source

The aerodynamic effects of wing–wing interaction in flapping insect wings [PDF]

open access: yes, 2005
We employed a dynamically scaled mechanical model of the small fruit fly Drosophila melanogaster (Reynolds number 100–200) to investigate force enhancement due to contralateral wing interactions during stroke reversal (the 'clap-and-fling').
Dickinson, Michael   +2 more
core   +2 more sources

Fluid dynamic analysis and lift enhancement of material transport and mixing around airfoil through Lagrangian coherent structures

open access: yesResults in Engineering, 2023
Flow separation around an airfoil can be effectively controlled by appropriately positioning a synthetic jet (SJ) on the airfoil surface, subsequently enhancing the airfoil's lift.
Chun Zhang, Shengli Cao, Zhilong Liu
doaj   +1 more source

Closed-loop Flow Control Method Based on Deep Reinforcement Learning using a Co-flow Jet [PDF]

open access: yesJournal of Applied Fluid Mechanics
A closed-loop control framework is developed for the co-flow jet (CFJ) airfoil by combining the numerical flow field environment of a CFJ0012 airfoil with a deep reinforcement learning (DRL) module called tensorforce integrated in Python.
Y. R. Zhao, H. Y. Xu, Z. Y. Xie
doaj   +1 more source

Control of Flow around an Oscillating Plate for Lift Enhancement by Plasma Actuators

open access: yesApplied Sciences, 2019
During insect flight, a feathering motion of the wing’s controls vortex shedding for lift enhancement. In this study, in order to control the flow around a wing flapping with simplified sinusoidal motion, plasma actuators were introduced to ...
Saya Sato   +2 more
doaj   +1 more source

Experimental Investigation of Lift Enhancement and Drag Reduction of Discrete Co-Flow Jet Rotor Airfoil

open access: yesApplied Sciences, 2021
Rotor airfoil design involves multi-point and multi-objective complex constraints. How to significantly improve the maximum lift coefficient and lift-to-drag ratio of rotor airfoil is a fundamental problem, which should be solved urgently in the ...
Shunlei Zhang   +4 more
doaj   +1 more source

Skin Application of Menthol Enhances Maximal Isometric Lifting Performance [PDF]

open access: yesJournal of Strength & Conditioning Research, 2023
Abstract Over, DM, Arjomandkhah, N, Beaumont, JD, Goodall, S, and Barwood, MJ. Skin application of menthol enhances maximal isometric lifting performance. J Strength Cond Res 37(3): 564–573, 2023—Topical application of menthol to the skin improves perception (i.e., makes subjects feel cooler) and changes submaximal neuromuscular recruitment ...
Daniel M. Over   +4 more
openaire   +2 more sources

Using a categorisation structure to understand interaction in children’s books [PDF]

open access: yes, 2013
Children’s books can vary greatly in the type of and depth of interaction that is required from the reader. The types of interaction demanded by different types of books can be explored using contrasting paradigms.
Timpany, Claire, Vanderschantz, Nicholas
core   +2 more sources

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