LDA measurements of the three mean velocity components and the corresponding turbulence intensities have been made to provide qualitative and quantitative information on the flow field in a water model of a can-type gas turbine combustion chamber. The combustor geometry comprised a swirl-driven primary zone, annulus-fed rows of primary and secondary jets, and an exit contraction. The effect of variation of the flow split between the swirler and the dilution holes on the flow pattern in the primary zone has been investigated in detail. Flow visualization studies revealed that significant changes occur in this region due to the interaction between the swirling flow and the radially directed primary jets. A large toroidal recirculation was formed and high levels of turbulence energy were generated in the core of the combustor at low levels of swirler flow rate. As the swirl level increases, the strength of this recirculation was observed to weaken. Beyond a critical level, the primary recirculation was pushed off center and the undesirable feature of a forward velocity on the combustor axis in the primary zone was observed. Despite the dramatic changes brought about in the primary zone, the flow pattern downstream of the secondary jets was practically the same for all flow splits due to the strong mixing caused by the two rows of jets.
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April 1989
Research Papers
Investigation of Swirler/Dilution Jet Flow Split on Primary Zone Flow Patterns in a Water Model Can-Type Combustor
P. Koutmos,
P. Koutmos
Imperial College of Science and Technology, Department of Mechanical Engineering, Fluids Section, London SW7 2BX United Kingdom
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J. J. McGuirk
J. J. McGuirk
Imperial College of Science and Technology, Department of Mechanical Engineering, Fluids Section, London SW7 2BX United Kingdom
Search for other works by this author on:
P. Koutmos
Imperial College of Science and Technology, Department of Mechanical Engineering, Fluids Section, London SW7 2BX United Kingdom
J. J. McGuirk
Imperial College of Science and Technology, Department of Mechanical Engineering, Fluids Section, London SW7 2BX United Kingdom
J. Eng. Gas Turbines Power. Apr 1989, 111(2): 310-317 (8 pages)
Published Online: April 1, 1989
Article history
Received:
January 17, 1989
Online:
October 15, 2009
Citation
Koutmos, P., and McGuirk, J. J. (April 1, 1989). "Investigation of Swirler/Dilution Jet Flow Split on Primary Zone Flow Patterns in a Water Model Can-Type Combustor." ASME. J. Eng. Gas Turbines Power. April 1989; 111(2): 310–317. https://doi.org/10.1115/1.3240253
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