旋流器套筒扩张角对燃烧室出口温度分布的影响

Effects of swirler sleeve angle on combustor exit temperature distribution

为研究旋流器套筒扩张角变化对燃烧室出口温度分布的影响,针对配装套筒扩张角分别为90°、80°、70°和60°共4种方案双级旋流器的全环回流燃烧室开展了出口温度分布试验,并结合三头部模型燃烧室粒子成像测速仪流场试验结果对其影响原因进行了分析。结果表明:随着套筒扩张角由90°减小为60°,出口周向温度分布均匀性变差,出口温度分布系数(OTDF)由0.198上升到0.334。套筒扩张角变化对出口径向温度分布曲线的影响较小,出口径向温度分布系数(RTDF)在0.077左右。在试验范围内,燃烧室出口温度分布品质随套筒扩张角的减小而恶化。

In order to understand the effects of swirler sleeve angle on the combustor exit temperature distribution,experimental investigations were conducted on the full annular reverse-flow combustor of dual swirler with sleeve angle of 90°,80°,70°and 60°.The flow field characteristics of threesector model combustor obtained by PIV were used to analyzed the mechanism of sleeve angle effects.The experimental results indicated that when the sleeve angle decreased from 90°to 60°,the uniformity of exit circumferential temperature distribution was deteriorated and the overall temperature distribution factor(OTDF)increased from 0.198 to 0.334.The exit radial temperature distribution curve was less affected by sleeve angle variation,and the radial temperature distribution factor(RTDF)was maintained at about 0.077.Within the test range,the combustor exit temperature distribution property was deteriorated as the sleeve angle decreased.