eprintid: 872
rev_number: 5
eprint_status: archive
userid: 31
dir: disk0/00/00/08/72
datestamp: 2008-02-22
lastmod: 2016-04-20 06:34:26
status_changed: 2009-09-23 16:39:47
type: article
metadata_visibility: show
creators_name: Revuelta Bayod, Antonio
creators_name: Sánchez Pérez, Antonio Luis
creators_name: Liñán Martínez, Amable
creators_orcid: 0000-0002-6161-8715
title: The quasi-cylindrical description of submerged laminar swirling jets
ispublished: pub
subjects: fisica
subjects: aeronautica
keywords: approximation theory; integration; jets; laminar flow; stratified flow; swirling flow; vortices; quasicylindrical description; submerged laminar swirling jets; emerging flow structure; swirling motion; adverse pressure gradient; momentum flux; annular structure; vortex breakdown;
abstract: TThe quasi-cylindrical approximation is used to describe numerically the structure of a submerged swirling jet for subcritical values of the swirl ratio S<Sc . The emerging flow structure is affected by the swirling motion, which enhances the entrainment rate of the jet and induces an adverse pressure gradient that reduces its momentum flux. The effect is more pronounced as the swirl ratio S is increased, yielding for sufficiently large values of S a jet with an annular structure. The integration describes the smooth transition towards the far-field self-similar solution for all values of S smaller than a critical value S5Sc , at which the numerical integration fails to converge at a given downstream location. The comparisons with previous experimental results confirm the correspondence between the onset of vortex breakdown and the failure of the quasi-cylindrical approximation.
date: 2004-03
date_type: published
official_url: http://scitation.aip.org/dbt/dbt.jsp?KEY=PHFLE6
full_text_status: public
publication: Physics of Fluids
volume: 16
number: 3
pagerange: 848-851
institution: Aeronauticos
department: Motopropulsion
refereed: TRUE
issn: 1070-6631
rights: by-nc-nd
citation:    Revuelta Bayod, Antonio, Sánchez Pérez, Antonio Luis and Liñán Martínez, Amable ORCID: https://orcid.org/0000-0002-6161-8715 <https://orcid.org/0000-0002-6161-8715>  (2004).  The quasi-cylindrical description of submerged laminar swirling jets.   "Physics of Fluids", v. 16  (n. 3);   pp. 848-851.  ISSN 1070-6631.    
document_url: https://oa.upm.es/872/1/LINAN_2004_05.pdf