摘要
应用非定常N-S方程,k-ε湍流双方程模型,EDC燃烧模型和离散坐标辐射传热模型,对高温空气换向非稳定燃烧特性进行了初步研究。比较了在理想换向条件和实际换向条件下,非稳定燃烧过程对炉内温度特性的影响。计算结果表明,换向瞬间炉膛压力有较大波动,甚至出现负压。助燃空气射流状态对非稳定燃烧过程中炉内温度、氧浓度有一定影响。针对模拟结果,提出蓄热式加热炉换向优化控制方案,为蓄热式燃烧系统的研制提供了理论指导。
Base on the application of the transient N - S equations, k - ε turbulence model, EDC combustion model and discrete ordinates radiation model, the characteristics of high temperature air combustion （HiTAC） during switching period are investigated. Temperature distribution was compared with ideal and practical switching conditions. The results of numerical study indicate that furnace pressure fluctuation is intensive in switching instant, even furnace negative pressure would be emerged. In addition, combustion air jet condition effects the furnace temperature distribution and oxygen concentration. According to the simulate result, an optimal design of combustion switching control system is provided, which supplies a theoretical guidance for the design of regenerative combustion system.
出处
《冶金能源》
北大核心
2008年第5期16-20,共5页
Energy For Metallurgical Industry
基金
国家自然科学基金资助项目(NO.50206014)
上海市教育委员会曙光科研项目(NO.05SG23)
关键词
高温空气燃烧技术
蓄热式加热炉
非稳定燃烧
换向控制
high temperature air combustion
regenerative furnace
unsteady combustion
switching control
