航空发动机

刘小克1 ，刘恩惠 2 ，刘潇3.燃料与空气预混方法及性能研究进展[J].航空发动机,2024,50(3):9-16

燃料与空气预混方法及性能研究进展

Research Progress on Fuel-Air Premixing Method and Performance

DOI：

英文关键词:low emissions combustion chamber gas turbine NO X emission premixing uniformity

基金项目:航空动力基础研究项目资助

作者	单位
刘小克1 ，刘恩惠 2 ，刘潇3	1.中国航发沈阳发动机研究所， 2.中国航发燃气轮机有限公司：沈阳 110015； 3.哈尔滨工程大学动力与能源工程学院，哈尔滨 150001

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中文摘要:

随着大气污染物排放标准的日益严格，低排放燃烧技术已成为先进燃气轮机发展的关键技术之一。在气态燃料低排放燃烧室中，燃料与空气的预混均匀性是影响NO X 生成的关键因素。基于污染物生成机理及控制方法，指出了燃料空气预混均匀性与NO X 排放的关系，即均匀性越好，NO X 排放越少。根据现有研究内容，从结构参数、旋流/湍流强度、预混距离以及边界条件（温度和压力）等4个方面梳理了国内外提高低排放燃烧室内燃料与空气预混均匀性的研究进展，提出可以通过增大旋流数、燃料穿透深度、预混长度等参数以提高预混均匀性，指出了目前研究中缺少小尺寸短距离空间内燃料与预混均匀性的预测。基于低排放燃烧室技术水平和发展趋势，认为未来的研究方向应为短距离、受限空间内燃料与空气预混均匀性的定量预测与评估。

英文摘要:

With the increasingly stringent emission standards of air pollutants， low-emission combustion technology has become one of the key technologies in the development of advanced gas turbines. The uniformity of fuel-air premixing is the key factor affecting NOx generation in a low-emission combustion chamber with gaseous fuel. Based on the mechanism of pollutant generation and control methods， the relationship between premixing uniformity and NO X emissions is pointed out， the better the uniformity， the less NOx emissions. According to existing research contents， the research progresses on improving fuel-air premixing uniformity in low-emission combustion chambers at home and abroad is summarized from four aspects： the structural parameters， swirl/turbulence intensity， premixing distance， and boundary conditions （temperature and pressure）. It is suggested that the premixing uniformity can be improved by increasing the swirl number， fuel penetration depth， premixing length， etc. It is pointed out that the prediction of fuel and premixing uniformity in small-size and short-distance space is lacking in recent research. Based on the technical level and development trend of low-emission combustion chamber ， it is believed that the future research direction should be the quantitative prediction and evaluation of fuel-air premixing uniformity in short-distance and confined spaces.

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