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.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
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)
关键词
火焰稳定器
钝体
数值模拟
阻力
尾迹结构
bluff body
flame holder
numerical simulation
drag force
wake structure
