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Fluctuation characteristics of spray velocity field of coaxial convergent nozzle by particle-image-velocimetry measurements / Cong Du in Transactions of the ASME . Journal of fluids engineering, Vol. 134 N° 6 (Juin 2012) 

Public ISBD [article]  in Transactions of the ASME . Journal of fluids engineering > Vol. 134 N° 6 (Juin 2012) . - 08 p. Titre : Fluctuation characteristics of spray velocity field of coaxial convergent nozzle by particle-image-velocimetry measurements Type de document : texte imprimé Auteurs : Cong Du, Auteur ; Jian-Zhong Liu, Auteur ; Zhen-Yu Huang, Auteur Année de publication : 2012 Article en page(s) : 08 p. Note générale : fluids engineering Langues : Anglais (eng) Mots-clés : coaxial  elements;  annular  liquid  jets;  spray  velocity;  spectrum  analysis;  fluctuations Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Coaxial elements and annular liquid jets are normally utilized in industrial applications to generate sprays. A particle image velocimetry investigation on the transient characteristics of the spray velocity field of a coaxial convergent nozzle is carried out in this paper. Based on the measurement results, spectrum analysis is performed to detect the process of atomization in the spray. Experimental results show that at large gas jet velocities, the process of generation of droplets is controlled mainly by the dynamics of liquid ligaments, and the power spectrum reveals that the velocity fluctuations are superimposed on the transient flow field by the effect of the shear layer instability. With the increase of gas velocity, the fluctuations of the spray velocity develop progressively to higher frequencies. DEWEY : 620.1 ISSN : 0098-2202 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JFEGA4000134000006 [...] [article] Fluctuation characteristics of spray velocity field of coaxial convergent nozzle by particle-image-velocimetry measurements [texte imprimé] / Cong Du, Auteur ; Jian-Zhong Liu, Auteur ; Zhen-Yu Huang, Auteur . - 2012 . - 08 p. fluids engineering Langues : Anglais (eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 134 N° 6 (Juin 2012) . - 08 p. Mots-clés : coaxial  elements;  annular  liquid  jets;  spray  velocity;  spectrum  analysis;  fluctuations Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Coaxial elements and annular liquid jets are normally utilized in industrial applications to generate sprays. A particle image velocimetry investigation on the transient characteristics of the spray velocity field of a coaxial convergent nozzle is carried out in this paper. Based on the measurement results, spectrum analysis is performed to detect the process of atomization in the spray. Experimental results show that at large gas jet velocities, the process of generation of droplets is controlled mainly by the dynamics of liquid ligaments, and the power spectrum reveals that the velocity fluctuations are superimposed on the transient flow field by the effect of the shear layer instability. With the increase of gas velocity, the fluctuations of the spray velocity develop progressively to higher frequencies. DEWEY : 620.1 ISSN : 0098-2202 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JFEGA4000134000006 [...]