摘要
为确定驻涡燃烧室中心驻体最佳宽度,在四种来流条件下,对当量宽度为0.3～0.8范围,间隔为0.05当量宽度的中心驻体驻涡燃烧室三维黏性流场进行了冷态数值模拟.计算结果表明,当量宽度在0.65～0.70的中心驻体有利于在驻涡腔内形成低速且稳定的流动.驻体宽度增加会导致驻涡腔外侧主流气流速度提高,引起摩擦损失的加大,燃烧室出口截面处的总压损失增加.
The numerical simulation has been carried out to investigate the effect of the center-body with of different equivalent widths （from 0.3 to 0.8,interval 0.05） in the trapped vortex combustor under four different inlet conditions,so as to select the width of the center-body in the trapped vortex combustor. The results show there is a proper scale of the width to establish the low velocity and steady flow region in the trapped vortex cavity. The total pressure loss at the combustor outlet increases with rising center-body width.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2010年第5期1005-1010,共6页
Journal of Aerospace Power
基金
国家自然科学基金(50676013)
关键词
驻涡燃烧室
中心驻体宽度
数值模拟
trapped vortex combustor
center-body width
numerical simulation
