Research on the Ignition Process and Flame Stabilization of a Combination of Step and Strut: Experimental and Numerical Study

Shilong Zhao (), Hui Xiao and Yafan Li
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Shilong Zhao: School of Aeronautics and Astronautics, Sun Yat-sen University, Shenzhen 518107, China
Hui Xiao: School of Aeronautics and Astronautics, Sun Yat-sen University, Shenzhen 518107, China
Yafan Li: School of Aeronautics and Astronautics, Sun Yat-sen University, Shenzhen 518107, China

Energies, 2023, vol. 16, issue 6, 1-16

Abstract: A combined application of step and strut was put forward to achieve reliable ignition and flame stabilization. In this work, the ignition process and temperature distribution have been tested, and a new reduction approach applied to jet fuel oxidation mechanism was developed to present a flow map via tracking C and H reaction paths, then the minor and major reactions were verified according to relative occurrence probabilities. With the half decrease of mechanism size, bias occurred and was controlled within 1.8%. This reduction method had such characteristics as universality, intuition, and quantification, due to its inherent simplification theory. This simulation of ignition process was always consistent with experimental results, which depicted kernel generation, flamelet breakup and flame propagation. Also, the influence of inlet temperature on outlet temperature and component distribution was performed, the biases of experimental and numerical results were within 5%. Chemical characteristics of Kerosene/air premixed combustible had changed and side reactions occurred to jet fuel above 900 K, which led to a converse effect on flame spreading. The side reactions aggravated the increasing coproducts of CO and CH4, which caused the decrease of volumetric heat production.

Keywords: ignition process; flame stability; mechanism reduction; reaction path; temperature distribution (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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