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Effect of hydrogen addition on conjugate heat transfer in a planar micro-combustor with the detailed reaction mechanism: An analytical approach.
- Source :
-
International Journal of Hydrogen Energy . May2020, Vol. 45 Issue 30, p15425-15440. 16p. - Publication Year :
- 2020
-
Abstract
- In this study, a steady state analytical investigation of conjugate heat transfer in a planar micro-combustor is presented by considering the detailed reaction mechanisms for a methane/air mixture with 10% and 20% hydrogen addition. The primary objective is studying the effects of hydrogen addition on the wall and gas temperature distribution in order to propose a practical solution to manage the significant heat transfer in micro-combustors. The reactive mixture is divided into the pre-flame, reaction, and post-flame zones. Then, the conservation equations are analytically solved in each zone using the matching conditions. Moreover, to present a general analysis, appropriate non-dimensional thermal parameters are recommended considering the thermal interaction between the reactive mixture, solid structure and ambient. As a result, appropriate correlations for the normalized wall temperature profile are presented for different situations that can be used as a prescribed wall temperature distribution in numerical simulations. Moreover, it is found that for the cases with solid-fluid thermal diffusion ratio greater than 50, the thermal properties can negate the effect of hydrogen addition on the wall temperature distribution. • Effect of hydrogen addition on conjugate heat transfer is analytically investigated. • Appropriate correlations for wall temperature profile are proposed under different conditions. • The outlet gas temperature becomes more sensitive to SFTDR by hydrogen addition. • Hydrogen addition is highly effective in changing the length of pre-flame and post-flame zones. • The maximum gas temperature is raised around 8% by adding 10% hydrogen. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 45
- Issue :
- 30
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 143310817
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2020.03.236