旋流器特征参数对高温升燃烧室性能的影响

利用数值模拟方法考察了3级旋流器特征参数(旋向组合、旋流数)对提出的中心分级燃烧室燃烧性能的影响。对12种不同的方案进行了比较,选出了最优的3级旋流器匹配方案。计算结果表明:3级旋流器的特征参数对燃烧室流场结构和燃烧性能有很大影响;合理的旋流器旋向组合和旋流数是提高燃烧室性能的关键因素。3级旋流器旋向组合为第1、2级反向,第2、3级同向,旋流角度组合为第1级40°,第2、3级均为45°时,燃烧室可以达到最佳的燃烧效果。

Effect of Swirler Characteristic Parameters on Combustion Performance of HTR Combustor

The effect of triple-swirler characteristic parameters (swirling directions and swirl number) on the the proposed cencentric staged combustor performance was examined by numerical simulation. The optimized triple-swirler design scheme was determined based on 12 different schemes comparison. The calculating results show that triple -swirler characteristic parameters have great influences on combustor flow field and combustion performances. Appropriate swirling directions and swirl numbers are the key factors to improve the combustor performance. When the primary and the second swirler are counter-rotating, the second and third swirler are synclastic-rotating,and the the primary swirl angle is 40°, the second and third swirl angles are both 45°, the combustor can work best.