开缝钝体火焰稳定器的冷态流场分析  

Study of flow over slitted bluff flame holders in cold state

作　　者：杜一庆[1] 钱壬章[1] 张孝春[2] 尚守堂[2] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074 [2]沈阳发动机设计研究所,辽宁沈阳110015

出　　处：《华中科技大学学报（自然科学版）》2004年第12期69-71,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：航空科学基金资助项目 (0 2C0 6 0 0 3)

摘　　要：利用RNGk ε湍流模型对开缝钝体火焰稳定器的流场进行了数值模拟 ,模拟结果与阻力实验值相符 .对尾迹结构的分析结果表明 :如果选择合适的缝宽比 (δ/D =18% ) ,开缝钝体可同时具有阻力低、火焰稳定性好的特点 ;而在缝宽比δ/D =10 %和δ/D =2 5 %两种情况下 ,由于主、次回流区和中缝流之间的干扰加剧 ,易形成尾迹振荡 ,增加总压损失 .The flow over slitted bluff flame holders was simulated by RNG k-ε model. The simulations were consistent with the experimental investigation on drag force feature. The wake structures over the flame holder were analyzed, and the following were confirmed: The slitted bluff body with proper gap ratio (δ/d=18%) may have the features of low drag and stable flame-holding. At δ/d=10% and δ/d=25%, the perturbation among two recirculation zones classified as the primary one and the secondary one, and the gap flow becames more intense, which causes an unstable wake and increases the total pressure loss.

关 键 词：火焰稳定器 钝体 数值模拟 阻力 尾迹结构 

分 类 号：V235.113[航空宇航科学与技术—航空宇航推进理论与工程]