Solution of idle LBO problem for high FAR aero combustor

The paper sheds light on the idle lean blow off(LBO)problem for high fuel air ratio(FAR)com⁃bustor,which is impossible to be addressed with traditional aero combustor design.A significant improvement in aero combustor design is required to resolve the idle LBO issue.The authors detailed a practical and efficient solu⁃tion,which not only solved the idle LBO issue but also defined the aero-thermal design for high-FAR combustor.The design will usher in a new era of aero combustor.

蒸发式稳定器常压和低压燃烧性能试验研究

对斯贝蒸发式稳定器模型与5种新稳定器在常压和低压下的燃烧性能进行了研究,并与V型稳定器比较,试验低压可达0 035MPa,气流最高速度可达235m/s.试验结果表明:5种新稳定器的燃烧性能好于斯贝蒸发式稳定器,所优选的稳定器比斯贝蒸发式稳定器提高了点火性能、火焰稳定性和燃烧效率,特别是在低压下,扩大了贫富油熄火边界,而V型稳定器燃烧性能最差.

一体化凹腔支板稳定器贫油熄火性能初步试验

在来流温度773~1 073K、来流马赫数0.20~0.32及常压条件下,试验研究了来流温度及马赫数对一体化凹腔支板稳定器(ICBSF)贫油熄火(LBO)性能的影响。结果表明:由于凹腔结构有利于燃油的蒸发与雾化,一体化凹腔支板稳定器的贫油熄火油气比为0.001 3~0.002 7,具有较宽的贫油熄火边界;与传统钝体火焰器类似,一体化支板稳定器的贫熄油气比随着来流马赫数的增加而增大,随着来流温度的升高而减小。此外,当来流温度显著增高时,来流马赫数对一体化支板稳定器贫油熄火油气比的影响变弱;同样,当来流马赫数显著增高时,来流温度的影响也变弱。