摘要
以两种尺寸的中心突扩燃烧室为研究对象,分别进行了水流试验和大涡数值模拟。结果表明大涡模拟方法可以较好地刻画该型燃烧室内的流动过程;在剪切层中出现明显的旋涡结构,旋涡的产生、发展、脱落、破碎影响着燃烧室的流动状态;燃烧室的突扩比和进气道入口流速对速度脉动的强度和频率有不同程度的影响。
Hydraulic experiment and large eddy simulation were performed with in two different sizes centeral-dump combustor. From those processes, we found that large eddy simulation method can effectively describe flow state of the combustor. Vortex structure is found in shear layer, its formation, evolution, shedding and breakup affects flow state of the combustor. Expansion ratio and inflow velocity influence velocity fluctuation amplitude and frequency in different extent.
出处
《航空计算技术》
2008年第6期17-21,共5页
Aeronautical Computing Technique
关键词
中心突扩燃烧室
水流试验
大涡模拟
central- dump combustor
hydraulic experiment
large eddy simulation
