A study on the effects of air preheat on the combustion and heat transfer characteristics of Bunsen flames (PDF)
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- A study on the effects of air preheat on the combustion and heat transfer characteristics of Bunsen flames (PDF)
- 发表刊物：
- Fuel
- 摘要：
- Existing designs of small-scale burners and domestic cookers have relied on open flame, where a large amount of heat is lost with flue gas. Flue Gas Recirculation (FGR) has been an effective technique for energy saving for large-scale industrial furnaces. Against this background, an experimental study was conducted to investigate the thermal, emission and heating performance of CH4-H2/air flames in terms of their dependence on both dilution effect (CO2 and N2) and preheat effect (initial reactant temperature from 20 °C to 100 °C).
Testing of flame stability showed detrimental and favorable effects of dilution and preheat, respectively. Examination of flame height showed that under constant Re and Ф, the reaction cone is shorter at higher initial reactant temperature, indicative of enhanced burning velocity caused by preheat. Emission of CO and NOx was monotonically increased as the result of higher flame temperature due to preheat.
The key question whether flame heating performance can be promoted or not is answered by detailed analysis of the radial heat flux configurations. The data reveals that the combined effects of dilution and preheat indeed induce higher heat transfer rate, thus theoretical evidence is provided for feasibility of adoption of FGR in domestic cookers.
- 合写作者：
- Zhen ZH, Miao J, Leung CW, Cheung CS, Huang ZH
- 卷号：
- 2016, 184: 50-58
- 页面范围：
- 50-58
- 是否译文：
- 否
- 发表时间：
- 2016-11-15