驻涡燃烧室最佳中心驻体宽度选择的数值研究
Numerical simulation of center-body width in a trapped vortex combustor
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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.Abstract: 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.
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Key words:
- trapped vortex combustor /
- center-body width /
- numerical simulation
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