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ARTICLE
Numerical Analysis on Multi-Field Characteristics and Synergy in a Large-Size Annular Combustion Chamber with Double Swirlers
Zaiguo Fu1, *, Huanhuan Gao1, Zhuoxiong Zeng1, Jiang Liu1
1 College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China.
* Corresponding Author: Zaiguo Fu. Email: .
(This article belongs to this Special Issue: Advances in Modeling and Simulation of Complex Heat Transfer and Fluid Flow)
Computer Modeling in Engineering & Sciences 2020, 122(3), 805-830. https://doi.org/10.32604/cmes.2020.08825
Received 14 October 2019; Accepted 19 November 2019; Issue published 01 March 2020
Abstract
In order to comprehensively evaluate the flow and heat transfer performance
of a large-size annular combustion chamber of a heavy-duty gas turbine, we carried out
numerical computation and analyses on the velocity, temperature and pressure fields in
the chamber with double swirlers. The mathematical model of the coupling combustion,
gas flow, and heat transfer process was established. The influences of the inlet swirling
strength, fuel-air ratio and temperature of the premixed gas on the multi-field
characteristics and synergy were investigated on the basis of field synergy theory. The
results showed that the central recirculation zone induced by the inlet swirling flow
grows downstream in the combustion chamber. The velocity and temperature in the outlet
section of the chamber tend to be uniform due to the upstream improved synergy. The
outer swirl number of the premixed gas flow has a great influence on the comprehensive
flow and heat transfer performance of the combustion chamber. The synergy angles
change towards benefiting the synergy between velocity and temperature fields with the
increasing swirl numbers and inlet gas temperature while the velocity-pressure synergy
becomes poor. The increasing fuel-air ratio of premixed gas leads to different trends of
the velocity-temperature synergy and velocity-pressure synergy. The comprehensive
synergy representing the low-resistance heat transfer performance is evidently dominated
mainly by the velocity-temperature synergy.
Keywords
Cite This Article
Fu, Z., Gao, H., Zeng, Z., Liu, J. (2020). Numerical Analysis on Multi-Field Characteristics and Synergy in a Large-Size Annular Combustion Chamber with Double Swirlers.
CMES-Computer Modeling in Engineering & Sciences, 122(3), 805–830.