Heat propagation phenomenon of compressed natural gas /air premixed laminar flame impinging on a flat surface

• Published in: Case studies in thermal engineering 2024-12, Vol.64, p.105571, Article 105571
• Main Authors: Dhamudia, Kashinath, Mahato, Shambhu Kumar, Singh, Raushan Kumar, Kumar, Amit, Panda, Santosh Kumar, Sahu, Mithilesh Kumar, Hasnain, S M Mozammil, Zairov, Rustem
• Format: Article
• Language: English
• Subjects: Flame tip; Heat flux; Impinging heating; Premixed flame; Stagnation region
• ISSN: 2214-157X; 2214-157X
• DOI: 10.1016/j.csite.2024.105571

In this paper the heat transfer characteristics have been determined theoretically using heat propagation phenomena of compressed natural gas (CNG)/air premixed laminar flames impinging on flat surfaces. Effects of varied equivalence ratios (Ф), Reynolds numbers (Re), separation distances (H/d) and burner diameters (d) on stagnation point heat flux have been investigated. The simulation findings were validated with the available experimental data. The flat plate with the maximum heat flux at the stagnation position is located close to the margin of the innermost premixed reaction zone (i.e., at H/d, Re and d are 5, 1000, 8 mm). The flow of heat steadily decreases in axial direction as the separating distance from the inner reaction zone's tip increases. Greater separation lengths at the stagnation region cause a subsequent increase in heat flux. The objective of this investigation is to get an idea about the impact of existence of the plate on the flame and temperature distribution and to get clarity about the reason behind higher amount of heat flux owing to tip of the innermost reaction area at stagnation region.