Numerical Investigation on the Flame Characteristics of Lean Premixed Methane Flame Piloted with Rich Premixed Flame

Lili Zhang, Yongzhang Cui (), Pengfei Yin, Wenlong Mao and Pengzhao Zhang
Additional contact information
Lili Zhang: School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China
Yongzhang Cui: School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China
Pengfei Yin: School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China
Wenlong Mao: Shandong Special Equipment Inspection Institute Group Co., Ltd., Jinan 250101, China
Pengzhao Zhang: School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China

Energies, 2024, vol. 17, issue 14, 1-16

Abstract: The introduction of the pilot flame can stabilize the lean premixed flame and promote its industrial application. However, the interaction mechanism between the pilot and main flames is complicated. To reveal the effect of the pilot flame on the main flame, a laminar lean premixed flame adjacent to a rich premixed pilot flame on one side and a similar lean premixed flame on the other side was considered. A two-dimensional numerical model was adopted with detailed chemistry and species transport, also with no artificial flame anchoring boundary conditions. The results show that the pilot flame could promote the main flame stabilized in different locations with various shapes, by adjusting the stretch, heat transfer, and preferential diffusion in a complicated manner. The pilot flame improves the local equivalence ratio and transfer more heat to the main flame. The growth of the pilot flame equivalence ratio and inlet velocity enhances the combustion on the rich side of the main flame and helps it anchor closer to the flame wall. Both the curvature and strain rate show a significant effect on the flame root, which contributes to the main flame bending towards the pilot flame.

Keywords: pilot flame; flame structure; preferential diffusion; heat transfer; flame stretch (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: 2024
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/17/14/3430/pdf (application/pdf)
https://www.mdpi.com/1996-1073/17/14/3430/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:17:y:2024:i:14:p:3430-:d:1433652

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().