A swirling jet under the influence of a coaxial flow

Journal Article · Mon Sep 15 00:00:00 EDT 2008 · Experimental Thermal and Fluid Science

DOI:https://doi.org/10.1016/J.EXPTHERMFLUSCI.2008.04.010· OSTI ID:21116048

Giannadakis, A; Perrakis, K; Panidis, Th ^[1]

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1. University of Patras, Department of Mechanical Engineering and Aeronautics, Laboratory of Applied Thermodynamics (Greece)

The recirculating flow field generated by a swirling jet and a coaxial annular stream entering a pipe is investigated with the use of 2D-DPIV. Parametric change of inlet flow rates (constant tangential injection with change of annular flow and vice versa) is being considered in order to study the mean and turbulent flow field. A recirculation bubble stabilized close to the swirler exit is the dominating feature of the interaction between the inner swirling jet and the annular stream. Results are discussed in terms of bubble topology and dynamics on the basis of a modified Rossby number that appears to describe the trends of the complex flow field. (author)

• OSTI ID: 21116048
• Journal Information: Experimental Thermal and Fluid Science, Vol. 32, Issue 8; Other Information: Elsevier Ltd. All rights reserved; ISSN 0894-1777
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
JETS
TURBULENT FLOW
BUBBLES
INJECTION
TOPOLOGY
FLOW RATE
COMBUSTION CHAMBERS
PIPES
VORTICES
VORTEX FLOW
Coaxial flow
Vortex breakdown