摘要
为设计出一种能有效增强掺混、提高燃烧效率的燃料喷注方案,首次将锥形肋片与气动斜坡进行结构组合研究,并对小肋片/气动斜坡不同组合方式冷、热流场进行数值模拟,分析结果发现:与传统的气动斜坡喷射相比,多肋片展向组合后方喷射能取得较为理想的掺混效果,并且不会带来较大总压损失;引入燃气发生器后,肋片的掺混增强效果得到明显提升。改善后的喷射方案能提高约9%的燃烧效率。
In order to design a fuel-injection scheme that could effectively enhance mixing and improve combustion efficiency,in this paper,the structural combination of conical pylon and aero-ramp was studies for the first time,and numerical simulation was carried out upon the cold and hot flow fields of the small pylon/aero-ramp.The experimental results show that:compared with the injection of traditional aero-ramp,the rear injection of multiple pylons in the extended composites can achieve a better mixing effect without causing a large total pressure loss.With the gas generator introduced,the mixing enhancement effect of the pylons is improved significantly.The improved injection scheme can increase the combustion efficiency by approximately 9%.The numerical results can provide certain reference for engineering practice.
作者
杨宇
吴达
王应洋
李旭昌
张保山
YANG Yu;WU Da;WANG Yingyang;LI Xuchang;ZHANG Baoshan(Air and Missile Defense College,Air Force Engineering University,Xi’an 710051,China;School of Equipment Management and UAV Engineering,Air Force Engineering University,Xi’an 710051,China;Unit 92095 of the PLA,Taizhou 318050,China)
出处
《空气动力学学报》
CSCD
北大核心
2020年第5期938-947,I0003,共11页
Acta Aerodynamica Sinica
关键词
超燃燃烧室
小肋片
气动斜坡
掺混增强
数值模拟
燃料喷注
supersonic combustor
pylon
aero-ramp
mixing enhancement
numerical simulation
fuel-injection
作者简介
杨宇(1996-),男,河北沧县人,硕士研究生,研究方向:超燃冲压发动机燃烧室性能.E-mail:1923242374@qq.com。
