Modeling and analysis of 3D radiative heat transfer in combustor

Yue Zhou; Xijuan Zhu; Qisheng Guo; Pengcheng Qi; Jing Ma

doi:10.1515/tjj-2021-0067

Article

Modeling and analysis of 3D radiative heat transfer in combustor

Yue Zhou , Xijuan Zhu , Qisheng Guo , Pengcheng Qi and Jing Ma

Published/Copyright: December 15, 2021

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From the journal International Journal of Turbo & Jet-Engines Volume 40 Issue s1

Abstract

Compared with wall emission, gas thermal radiation is much more complicated because of its nongray and volumetric property. In this paper, a numerical method is established to calculate 3D radiative heat transfer in combustor by modelling radiative transfer as well as nongray radiative properties of combustion gases. Energy exchanges caused by thermal radiation and conduction are calculated and compared in a rectangular combustor, which shows the significant role of thermal radiation in heating fuel-air mixtures and prompting internal combustion reactions. Besides, radiative heat flux on the wall is also quite obvious although a non-contacting flow case, revealing the special challenges for thermal protections brought by radiant energy. Lastly, increasing the working pressure means much more participating species in radiative transfer process and the radiative effects will be also magnified. The numerical method in this paper provides a direct technique to analyze the role of thermal radiation in complex thermochemical reactions while the application case proves the necessity of coupling a high-accuracy radiation model when simulating combustion and flame propagation.

Keywords: combustion gas; convection; energy source term; radiative heat flux; thermal radiation

Corresponding author: Qisheng Guo, Military Exercise and Training Center, Army Academy of Armored Force, Beijing, China, E-mail: 3073136521@qq.com

Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2021-11-28

Accepted: 2021-12-01

Published Online: 2021-12-15

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Articles in the same Issue

https://doi.org/10.1515/tjj-2021-0067

Keywords for this article

combustion gas; convection; energy source term; radiative heat flux; thermal radiation