为了确定先进旋涡燃烧室后钝体开口结构参数(开口角度100°、开口尺寸2mm)下燃烧室最佳匹配长度,通过研究燃烧室长度对燃烧效率、出口温度分布及出口径向温度分布的影响,得出燃烧室最佳匹配长度为800mm。在此结构基础上,增加第三钝体形成双凹腔AVC(advancedvortexcombustor),对其燃烧流场进行数值模拟,结果表明当第二凹腔长度L₂及第三钝体开口尺寸L₃满足L₂/L₁=1.2,L₃/H=0.6时双凹腔开口AVC具有流场流动性好、燃烧稳定性好、温度分布高等优点。

In order to determine the best match length of slotted AVC (opening angle is 100°, slot size is 2mm), the effect of combustor length on combustion efficiency, the outlet temperature distribution and radial temperature distribution were numerically calculated. The results show the best match length of combustor is 800 mm, on the basis of this structure, the third blunt body was added for forming the double-cavity AVC, studies suggest that when the length of the second cavity is L2/L₁ = 1.2, slot size of the third blunt body is L3/H = 0. 6, AVC has advantages of good flow field, stable combustion, high temperature distribution.