冷气入射角及射流比对先进驻涡燃烧流动的影响

Effects of Cold Flow Injection Angle and Injection Ratio on Combustion Flow in Advanced Vortex Combustor

为了获得带导流片的先进旋涡燃烧室(AVC)壁面气膜冷却效率的变化规律,对不同冷空气入射角度以及射流比下的绝热壁面AVC冷却及掺混燃烧性能进行了数值模拟及分析。结果表明:入射角等于30°时,射流比越大压损越小;入射角等于60°时,压损相差不大;入射角等于90°时,射流比越大压损越大。入射角等于30°时,燃烧效率受射流比的影响较小;入射角等于90°时,燃烧效率随着射流比的增大而增大。射流比等于1.2及1.5时,燃烧效率随入射角的变化幅度较小;射流比等于1.8及2.0时,燃烧效率随入射角的增大而增大。

In order to obtain wall film cooling efficiency in Advanced Vortex Combustor（AVC）with flow guide vanes,numerical investigation was performed on the cooling and mixing combustion performance in AVC in the condition of different injection angles and injection ratios. The results show that when the injection angle is equal to 30°,the pressure loss decreases with the increase of the injection ratio,but the combustion efficiency is less affected. When the injection angle equals 60°,the pressure loss varies little,but when the injection angle is equal to 90°,the pressure loss and the combustion efficiency both increase. With the increase of the injection angle,when the injection ratio is equal to 1.2 and 1.5,the combustion efficiency varies slightly,but when the injection ratio is equal to 1.8 and 2,the combustion efficiency increases.