粉末燃料冲压发动机头部组织掺混流动数值模拟  

Numerical simulation of mixing flow in the head of powder fuel ramjet

作　　者：任蒙飞 席文雄 罗世彬 邓哲 张正泽 REN Mengfei;XI Wenxiong;LUO Shibin;DENG Zhe;ZHANG Zhengze(School of Aeronautics and Astronautics,Central South University,Changsha 410083,China;Xi'an Modern Chemistry Research Institute,Xi'an 710065,China)

机构地区：[1]中南大学航空航天学院,湖南长沙410083 [2]西安近代化学研究所,陕西西安710065

出　　处：《火箭推进》2020年第5期35-41,共7页Journal of Rocket Propulsion

基　　金：西安近代化学研究所开放合作创新基金(748030030)。

摘　　要：为了分析头部结构对粉末燃料冲压发动机内部掺混流动影响,基于某典型粉末燃料冲压发动机构型,设计了双下侧进气式方形头部和圆形头部,采用三维组分输运数值模拟方法,对比分析了方形头部和圆形头部的结构设计对发动机补燃室内部流场的影响。数值模拟结果表明:方形头部在补燃室头部仅形成弱回流区,各截面压力恢复系数沿着燃气流动方向逐渐减小。圆形头部结构产生的流场在对称面处形成类对称的强回流区,使补燃室的流动更益于粉末注入,各截面掺混效率和压力恢复系数均大于方形头部。In order to analyze the effect of the head structure on the internal mixing flow of the powder fuel ramjet engine,based on the configuration of a typical powder fuel ramjet,a square head and around head of the engine with double lower side intake were designed.The effect of the structural design of the square head and the circular head on the flow field in the afterburner chamber was analyzed and compared by the 3D numerical simulation method of component transport.The results demonstrate that the square head only forms a weak recirculation zone at the head of the afterburning chamber,and the pressure recovery coefficient of each section decreases gradually along the flow direction.However,the round head structure forms a symmetric strong backflow area at the symmetric plane,making the flow of the afterburning chamber more beneficial to the powder injection,and the mixing efficiency and pressure recovery coefficient of each section are larger than the square head.

关 键 词：粉末冲压发动机 补燃室 头部结构 掺混效率 压力损失 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]