The quasi-cylindrical description of submerged laminar swirling jets

Revuelta Bayod, Antonio and Sánchez Pérez, Antonio Luis and Liñán Martínez, Amable (2004). The quasi-cylindrical description of submerged laminar swirling jets. "Physics of Fluids", v. 16 (n. 3); pp. 848-851. ISSN 1070-6631.

Description

Title: The quasi-cylindrical description of submerged laminar swirling jets
Author/s:
  • Revuelta Bayod, Antonio
  • Sánchez Pérez, Antonio Luis
  • Liñán Martínez, Amable
Item Type: Article
Título de Revista/Publicación: Physics of Fluids
Date: March 2004
ISSN: 1070-6631
Volume: 16
Subjects:
Freetext 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;
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Motopropulsión y Termofluidodinámica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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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.

More information

Item ID: 872
DC Identifier: http://oa.upm.es/872/
OAI Identifier: oai:oa.upm.es:872
Official URL: http://scitation.aip.org/dbt/dbt.jsp?KEY=PHFLE6
Deposited by: Archivo Digital UPM
Deposited on: 22 Feb 2008
Last Modified: 20 Apr 2016 06:34
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