加湿燃烧研究现状

Current Status in the Study of the Humidified Combustion

首先从两个方面详细介绍了燃料加湿燃烧的研究成果,一方面是加湿对燃气轮机燃烧室内燃烧特性的影响,另一方面是加湿对燃料着火特性、可燃极限的影响。分析了目前加湿燃烧研究所取得的结论,空气加湿燃烧可以降低火焰燃烧温度、改变燃烧过程中的化学反应以及传热传质过程,影响火焰的流场和结构,使火焰趋于不稳定。同时燃烧区温度的降低有利于降低NOx排放,对HAT、IGCC等热力循环中降低NOx排放有重要意义,最后指出了目前加湿燃烧存在的不足,并结合本课题组的研究结论为后续研究方向提出了建议。

Firstly,the authors described in detail the research findings in the humidified combustion of fuel from the following two aspects: one is the influence of the humidification on the combustion characteristics of gas turbine combustors and another is the influence of the humidification on the ignition characteristics and combustible limits of fuel. Secondly,they also analyzed the conclusions currently obtained from the study of the humidified combustion. The air humidification combustion can lower the combustion temperature of the flame,change the chemical reactions during the combustion and heat and mass transfer process and influence the flow field and configuration of the flame,making the flame tend to be instable and at the same time,to lower the temperature in the combustion zone is favorable to reducing the NOx emissions and of a major significance for reducing the NOx emissions from the HAT and IGCC etc. thermal cycles. Finally,the authors pointed out that there do exist some shortcomings in terms of the humidified combustion and gave suggestions for the future studies in this regard on the basis of the foregoing research results.