摘要
以简化的主燃烧室模型为研究对象,采用数值模拟方法对燃烧室内主燃孔射流与回流区之间的相互作用机理开展研究。对比分析了主燃孔的射流位置,主燃孔进气结构对燃烧室主燃区的流场形态和燃烧性能(OTDF、NOx排放)的影响。计算结果表明:主燃孔射流有助于缩短燃烧室回流区的长度,强化燃油掺混,改善燃烧室的燃烧特性。但射流强度过大,射流位置距离头部回流区的距离过近或过远,都将对燃烧室的流场特性和燃烧性能产生不利的影响。
Taking a model gas turbine combustor as the research object,the aerodynamic interactions between the recirculation zone of the combustor and the primary air jets were studied by a numerical simulation method.The effects of location and structure of primary air jet holes on the flow field characteristics and combustion performance(OTDF and NOx emission)of the combustion zone were analyzed.Results show that it is advantageous for the primary air jets to shorten the length of recirculation zone,enhance the mix of fuel and improve the combustion characteristics of combustor.However,if the jet intensity is too high and the distance between the primary air jets and the recirculation zone of the combustor is too long or short,the flow field characteristics and combustion characteristics of the model gas turbine combustor would be affected adversely.
作者
林宏军
LIN Hong-jun(Department of Advanced Research and Development,AECC Shenyang Engine Research Institute,Shenyang 110015,China)
出处
《沈阳航空航天大学学报》
2018年第1期16-21,29,共7页
Journal of Shenyang Aerospace University
基金
国家自然科学基金(项目编号:91441126)
关键词
主燃烧室
主燃孔射流
数值模拟
燃烧性能
combustor
primary air jets
numerical simulation
combustion characteristics
