摘要
在涡扇发动机基础上,以脉冲爆震燃烧室代替普通加力燃烧室构成涡扇-脉冲爆震组合发动机。对该组合动力,涡扇发动机内外涵掺混过程对脉冲爆震燃烧室的进气状况有着重要的影响,本文针对环形混合器和波瓣混合器进行了数值模拟,揭示了两种混合器不同的掺混机理,同时研究了不同穿透率的波瓣混合器对流场的影响。结果表明,相对于环形混合器,采用波瓣混合器能够获得良好的掺混效果和PDE入口温度的提高;但随着穿透率的增加,波瓣混合器总压损失也会增加,同时PDE入口的氧气浓度也有所降低。
Based on a turbofan engine, the afterburner is replaced with pulse detonation combustor to form a turbofan-pulse detonation hybrid engine. For the hybrid power, the mixing process between the core flow and fan flow has important effect on the intake condition of the pulse detonation combustor. The circular mixer and lobed mixer are investigated numerically to reveal different mixing principles of the mixers. And the effects of lobed mixers with different penetration ratios are also investigated. The results show that： compared to the circular mixer, better mixing and higher temperature at the pulse detonation combustor inlet can be acquired by using lobed mixers, but with the increase of the lobed mixer penetration ratio, the total pressure loss will increase simultaneously and the mass fraction of 02 at the pulse detonation combustor inlet will decrease.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第8期1437-1439,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.0676065
No.20533040)
