导流片结构参数对四通道环形进气先进旋涡燃烧室性能影响

四通道环形进气先进旋涡燃烧室（AVC）上下两个通道具有冷却燃烧壁面、中间两通道的靠近燃烧室轴线的通道面积小，在贫油燃烧时，一定程度上可充当值班火焰通道的作用。以导流片到前钝体上端面的距离与燃烧室进气通道高度之比 a/E、导流片伸入凹腔的长度与前钝体高度之比 b/H、导流片到前钝体后端面的距离与凹腔长度之比 c/L 为研究对象进行数值模拟，并分析导流片结构参数 a/E、b/H、c/L 不同时燃烧室的流场分布、涡结构、总压损失、燃烧效率。结果表明：随着 a/E 增大，燃烧效率不断提高，但总压损失系数也增大；b/H、c/L 对 AVC 性能的影响较小；当 a/E=0.3、b/H=0.4 及 c/L=0.2 时，燃烧室性能达到最佳；引入导流片后，凹腔内形成稳定的双旋涡结构，凹腔稳焰及燃气掺混有所增强，总压损失较小的同时燃烧效率大幅度提高。

Investigations of Flow Guide Vanes Geometric Parameters onPerformance of Four-duct-annular Advanced Vortex Combustor

To investigate the performance of combustion and flow characteristics of four-duct-annular advanced vortex combustor with flow guide vanes, the effects of different structure parameters of the flow guide vanes on flow fields, structure of vortices, the total pressure loss, combustion efficiency were numerically analyzed. The results show that the stable dual vortices structure is formed in the cavity, the stability of flame and the mixing of gas in the cavity are enhanced and the combustion efficiency is greatly increased. The structure parameter a/E influences the performance of the combustor significantly. With the increasing value of a/E, the combustion efficiency increases significantly, but the total pressure loss coefficient also increases simultaneously. When the value of b/H increases, the combustion efficiency and total pressure loss coefficient decrease simultaneously. The combustion efficiency and total pressure loss coefficient decrease first and then rise slightly with the increasing value of c/E. When a/E=0.3, b/H=0.4, c/L=0.2, the best characteristic of the combustor is achieved with the combustion efficiency 98.56%, the total pressure loss coefficient 3.194%.