基于可分离支板喷注的斜爆震发动机掺混与起爆特性的影响研究  

Study on the Influence of Mixing and Initiation Characteristics of Inclined Detonation Engine Based on Separable Support Plate Injection

作　　者：李珑罡 秦琼瑶 李建中[1] 金武 姚倩 李夏飞[1] 刘亿东 袁铭泽 Li Longgang;Qin Qiongyao;Li Jianzhong;Jin Wu;Yao Qian;Li Xiafei;Liu Yidong;Yuan Mingze(Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学,江苏南京210016

出　　处：《气动研究与试验》2025年第1期41-52,共12页Aerodynamic Research & Experiment

摘　　要：斜爆震发动机是近现代空天领域中十分重要的推进装置,其工作条件相对苛刻,飞行马赫数至少需要达到燃气的Chapman-Jouguet (C-J)值,因此,如何在相对低的飞行马赫数下实现均匀的燃料分布并形成驻定的斜爆轰波是高超声速推进系统中亟待解决的问题。本文提出一种可分离支板结构,两块支板可以根据需求变换位置。考虑详细化学反应机理,数值模拟研究了燃烧室入口马赫数对起爆特性的影响(对应进气道进口Ma 6~9)。数值模拟结果表明,可分离支板可以实现相对较低马赫条件下(Ma 9)的可靠稳定起爆。Ma 6~8时斜爆轰波在楔面上不能驻定,并且获得了Ma 6情况下的非驻定爆震波的动态演化过程。通过提出新型的支板喷注结构探索了斜爆震发动机的混气形成和楔面起爆技术,该结果可为斜爆震发动机的设计提供指导。The oblique detonation engine is a very important propulsion device in the air and space fields of modern times.Its working conditions are relatively demanding,and the flight Mach number needs to reach at least the Chapman-Jouguet(C-J)value of the gas,so how to achieve uniform fuel distribution and form a stationary oblique detonation wave at a relatively low flight Mach number is a problem that needs to be solved urgently in hypersonic propulsion systems.This paper proposes a separable plate structure,and the two plates can be positioned according to needs.Considering the detailed chemical reaction mechanism,the influence of the inlet Mach number on the ignition characteristics was studied numerically(corresponding to the inlet Ma 6~9 of the intake duct);the numerical simulation results show that the separable plate can achieve reliable and stable ignition at relatively low Mach numbers(Ma 9).The oblique detonation wave cannot be stationary on the inclined surface at Ma 6-8,and the dynamic evolution process of the non-stationary detonation wave at Ma 6 is obtained.The exploration of a novel strut injection structure has investigated the formation of the mixed gas and the wedge surface ignition technology in oblique detonation engines.This result can provide guidance for the design of oblique detonation engines.

关 键 词：斜爆震发动机 分离支板 掺混 数值模拟 

分 类 号：V430[航空宇航科学与技术—航空宇航推进理论与工程] V231.22