Laminar Craya-Curtet jets

Revuelta Bayod, Antonio and Martínez Bazán, Carlos and Sánchez Pérez, Antonio Luis and Liñán Martínez, Amable (2004). Laminar Craya-Curtet jets. "Physics of Fluids", v. 16 (n. 1); pp. 208-211. ISSN 1070-6631.


Title: Laminar Craya-Curtet jets
  • Revuelta Bayod, Antonio
  • Martínez Bazán, Carlos
  • Sánchez Pérez, Antonio Luis
  • Liñán Martínez, Amable
Item Type: Article
Título de Revista/Publicación: Physics of Fluids
Date: June 2004
ISSN: 1070-6631
Volume: 16
Freetext Keywords: aerodynamics; boundary layers; flow instability; flow simulation; flow visualisation; jets; laminar flow; stratified flow; laminar Craya Curtet jets; large Reynolds number; coaxial ducted flow; coflowing stream; boundary layer approximation; steady slender jet; streamlines; entrainment; toroidal recirculation region; parabolic coflow; flow visualizations; flow structure;
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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This Brief Communication investigates laminar Craya-Curtet flows, formed when a jet with moderately large Reynolds number discharges into a coaxial ducted flow of much larger radius. It is seen that the Craya-Curtet number, C=(J/sub c//J/sub j/)/sup 1/2/, defined as the square root of the ratio of the momentum flux of the coflowing stream to that of the central jet, arises as the single governing parameter when the boundary-layer approximation is used to describe the resulting steady slender jet. The numerical integrations show that for C above a critical value C/sub c/ the resulting streamlines remain aligned with the axis, while for C<C/sub c/ the entrainment demands of the jet cannot be satisfied by the coflow, and a toroidal recirculation region forms. The critical Craya-Curtet number is determined for both uniform and parabolic coflow, yielding C/sub c/=0.65 and C/sub c/=0.77, respectively. The streamlines determined numerically are compared with those obtained experimentally by flow visualizations, yielding good agreement in the resulting flow structure and also in the value of C/sub c/

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Item ID: 871
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Deposited by: Archivo Digital UPM
Deposited on: 22 Feb 2008
Last Modified: 20 Apr 2016 06:34
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