驻涡火焰稳定器式粉末燃料冲压发动机两相流数值模拟  

Numerical simulation on two-phase flow in the trapped vortex flame holder-based powdered fuel ramjet

作　　者：孔龙飞[1] 夏智勋[1] 胡建新[1] 王德全[1] 

机构地区：[1]国防科技大学高超声速冲压发动机技术重点实验室,长沙410073

出　　处：《固体火箭技术》2013年第1期32-36,共5页Journal of Solid Rocket Technology

基　　金：航空科学基金(20080188)

摘　　要：根据已有粉末燃料冲压发动机的特点,设计了驻涡火焰稳定器,并对现有发动机结构进行了改进,提出了驻涡火焰稳定器式粉末燃料冲压发动机。采用颗粒轨道模型,对镁基粉末燃料冲压发动机进行了三维流场数值模拟,对比分析了改进前后发动机内流场结构对该发动机燃烧效率的影响,以便为进一步的实验研究提供指导。数值模拟结果表明,驻涡火焰稳定器的应用,可使燃烧效率较现有发动机提高10%。A trapped vortex flame holder was designed for the powdered fuel ramjet, and the configration of trapped vortex flame holder-based powdered fuel ramjet was put forward. The 3D two-phase flow field in the magnesium powdered fuel ramjet was numeri- cally simmulated by the particle trajectory model. The effects of the ramjet internal flow field on the combustion efficiency was cont- rastively analyzed between the two configrations, so as to provide references for the further experimental investigation. The results show that the ramjet combustion efficiency is improved by 10% with the application of trapped vortex flame holder.

关 键 词：粉末燃料 冲压发动机 驻涡火焰稳定器 数值模拟 镁颗粒燃烧 

分 类 号：V430[航空宇航科学与技术—航空宇航推进理论与工程]