ADN基液体推进剂空间发动机工作过程模拟  

Numerical investigation of an aerospace thruster with ADN-based liquid propellant

作　　者：景李玥 霍佳龙 姚兆普[2] 游小清[1] 朱民[1] JING Liyue HUO Jialong YAO Zhaopu YOU Xiaoqing ZHU Min(Department of Thermal Engineering, Tsinghua University, Beijing 100084, China Beijing Institute of Control Engineering, Beijing 100190, China)

机构地区：[1]清华大学热能工程系,北京100084 [2]北京控制工程研究所,北京100190

出　　处：《清华大学学报（自然科学版）》2016年第10期1085-1090,共6页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金青年项目(51506007)

摘　　要：二硝酰胺铵(ADN)基液体推进剂是一种绿色环保的新型推进剂,可在小型空间推进系统中使用。该文通过数值模拟对ADN基液体推进剂空间发动机的工作过程进行热流仿真。使用Euler-Lagrange方法描述推进剂的蒸发过程,使用多孔介质局部非平衡模型描述催化床内的传热过程,同时考虑气、液、固三相之间的耦合。使用包含18组分40步反应的ADN-CH3OH简化反应机理来模拟气相物质的燃烧反应。数值计算所得发动机的宏观运行参数与实验值相符。结果表明:多孔介质会将催化床下游和燃烧室内反应所释放热量传导到催化床上游,强化推进剂的蒸发过程。在发动机内部,ADN与CH3OH的反应并不同步。ADN的热解反应发生在入口附近,而CH3OH的氧化反应发生在催化床中下游和燃烧室中。The ammonium dinitramide （ADN） based liquid propellant is an environmentally friendly propellant that can be used in small rockets. Combustion of an ADN-based liquid propellant in an aerospace thruster is investigated numerically with the droplets described by the Euler-Lagrange approach and with the heat transfer in the porous media using the non-equilibrium model. The interactions among the gas, liquid droplets and porous media are all included. An 18 species and 40 reactions reduced chemical mechanism is used to model the reactions between ADN and CH3OH in the gaseous phase to estimate the thruster performance. The resuits show that the heat release from the combustion is transferred upstream to enhance the evaporation of the liquid propellant by the porous media. In the thruster, the ADN decomposition and the CH3OH oxidization do not happen at the same time. The ADN decomposition occurs near the inlet while the CH3OH is oxidized downstream of the porous media and in the combustor.

关 键 词：二硝酰胺铵(ADN)基液体推进剂 空间发动机 数值模拟 

分 类 号：V511[航空宇航科学与技术—航空宇航推进理论与工程]