Results 61 to 70 of about 1,354,747 (243)

A study of mixing and intermittency in a coaxial turbulent jet [PDF]

, 2010
A large eddy simulation study of mixing and intermittency of a coaxial turbulent jet discharging into an unconfined domain has been conducted. The work aims to gain insight into the mixing and intermittency of turbulent coaxial jet configurations. The
Savill, A.M., Jenkins, K.W., Ranga Dinesh, K.K.J., Kirkpatrick, M. P., Savill, Mark A., Jenkins, Karl W., Ranga Dinesh, K. K. J., Kirkpatrick, M.P.   +7 more
core   +1 more source

Multistage, Self‐Sensing Artificial Muscles With Coordination From Liquid Crystal Elastomer‐Graphene Composite Fibers

Advanced Functional Materials, EarlyView.
Inspired by skeletal muscles’ precision and endurance, CoilLCE integrates a self‐sensing liquid crystal elastomer/graphene artificial muscle with an embedded Joule‐heating copper coil, enabling closed‐loop multistage actuation with programmable intermediate states (strain accuracy of 2%), and antagonistic coordination (32% total strain). These features
Ziyun Zhang, Xuelin Wu, Yinding Chi, Qingya Huang, Yaoye Hong, Antonio Proctor Martinez, Jingxian Wu, Bingzhi He, Cynthia Sung, Shu Yang   +9 more
wiley   +1 more source

Design and performance of an open jet wind tunnel for aero-acoustic measurement [PDF]

, 2009
This paper presents the design and performance of an open jet, blow down wind tunnel that was newly commissioned in the anechoic chamber at the ISVR, University of Southampton, UK. This wind tunnel is intended for the measurement of airfoil trailing edge
Chong, T.P., Joseph, P.F., Davies, P.O.A.L., Davies, POAL, Joseph, PF, Chong, TP   +5 more
core   +1 more source

A study on formation process of plate shock in underexpanded impinging jet

Nihon Kikai Gakkai ronbunshu, 2020
This study focuses on the formation process of plate shock in an underexpanded jet impinging on a flat plate. The jet discharged from a convergent nozzle is underexpanded when the pressure ratio across the nozzle exceeds the critical value.
Hiromasa SUZUKI, Ryosuke KUBOTA, Masaki ENDO, Yoko SAKAKIBARA   +3 more
doaj   +1 more source

An Analysis of Jet Noise Characteristics in the Compressible Turbulent Mixing Layer of a Standard Nozzle

Machines, 2022
In this paper, we seek to understand the influence of TPS standard nozzle shape on jet noise and improve the accuracy of flow and pressure ratio of aeronautical simulation.
Guozhen Mu, Qiongying Lyu, Yiming Li
doaj   +1 more source

Thermoresponsive Liquid Crystalline Polymer Coatings Programmed by Field‐Induced Topological Defects for Tunable Optical and Topographical Responses

Advanced Functional Materials, EarlyView.
Resonant standing waves generate large‐area lattices of liquid‐crystal topological defects that are permanently encoded into polymer coatings by photopolymerization. The preserved director architecture produces thermally reconfigurable surface topographies while maintaining programmable optical functionality, demonstrating a scalable strategy for ...
Jacques A. Peixoto, Mufeeduzaman Chavilkkadan, Alexander Fusi, Marko Beslać, Dirk J. Broer, Etienne Brasselet, Danqing Liu   +6 more
wiley   +1 more source

Instability Wave Models of Turbulent Jets from Round and Serrated Nozzles [PDF]

, 2010
In this thesis we study pressure fluctuations associated with large-scale coherent structures in turbulent round and serrated jets. Linear disturbances to the turbulent mean flow of the round jet are modeled via linear stability analysis and the ...
Guðmundsson, Kristján
core   +1 more source

Numerical analysis of jet noise for nozzles with different throat sizes

AIP Advances
To propose a method for testing the dynamic change rate of the throat diameter based on the characteristics of the jet noise field, this study measured the effect of the size variation of the throat diameter on the jet noise during engine nozzle ...
Yating Hou, Junzhu Zhang, Pengfei Nie, Xingcheng Han, Liming Wang   +4 more
doaj   +1 more source

Acoustic investigation on nozzles with different types of six lobed chevrons [PDF]

INCAS Bulletin, 2013
This paper deals with a few aspects of the notion of chevron and the process that helps reducing the noise pollution. Based on the gas dynamic and geometrical parameters of a single flow jet engine a model of CFD data processing is made.
Grigore CICAN, Daniel-Eugeniu CRUNTEANU
doaj   +1 more source

Sacrificial‐Layer‐Assisted Heat‐Affected‐Zone Suppression in Laser Patterning of PET for High‐Performance Flexible Devices

Advanced Functional Materials, EarlyView.
A removable sacrificial polymer layer engineers the thermal boundary condition during nanosecond laser ablation of PET, suppressing heat‐affected‐zone formation without relying on costly ultrafast lasers. This strategy enables deep, high‐aspect‐ratio trenches with no detectable heat‐affected zone, templating silver‐filled mesh electrodes with record ...
Mehdi Zarei, Mirza Sahaluddin, Mostafa Bedewy, Paul W. Leu   +3 more
wiley   +1 more source