Ignition and Lean Blowout Characteristics of a Reverse-Flow Combustor for an Ultra-Compact Gas Turbine Engine

  • JIN Yi ,
  • HUANG Yakun ,
  • YAO Kanghong ,
  • ZHANG Kai ,
  • WANG Yunbiao ,
  • WANG Donghao
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  • 1. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
    2. National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China
    3. Low-carbon Aerospace Power Engineering Research Center of Ministry of Education, Nanjing 210016, China

Online published: 2024-09-09

Supported by

This work was supported by the National Nature Science Foundation of China through Grant No. 51506086. Yakun would like to the Jiangsu Funding Program for Excellent Postdoctoral Talent (No. 316958), the Natural Science Foundation of Jiangsu Province, China (BK20230932), the China Postdoctoral Science Foundation (No. 2023M741697), the Fundamental Research Funds for the Central Universities (No. 30923010306), and the financial support from Low-carbon Aerospace Power Engineering Research Center of Ministry of Education (CEPE2020018).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024

Abstract

The flame stability limit and propagation characteristics of a reverse-flow combustor without any flame-stabilized device were experimentally investigated under room temperature and pressure. The results indicate that it is feasible to stabilize the flame in the recirculation zones constructed by the impact jet flow from the primary holes and dilution holes. The flame projected area is mainly distributed in the recirculation zone upstream of the primary holes, whose presence and absence mark the ignition and extinction. During the ignition process, the growth rate and value of the flame projected area first increase and then decrease with the inlet velocity increasing from 9.4 m/s to 42.1 m/s. A rapid reduction followed by a slow reduction of ignition and lean blowout equivalence ratios is achieved by the increased inlet velocity. Then the non-reacting fluid structure in three sections was measured, and detailed velocity profiles were analyzed to improve the understanding of the flame stabilization mechanism. The results are conducive to the design of an ultra-compact combustor.

Cite this article

JIN Yi , HUANG Yakun , YAO Kanghong , ZHANG Kai , WANG Yunbiao , WANG Donghao . Ignition and Lean Blowout Characteristics of a Reverse-Flow Combustor for an Ultra-Compact Gas Turbine Engine[J]. Journal of Thermal Science, 2024 , 33(5) : 1897 -1906 . DOI: 10.1007/s11630-024-2011-3

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