催化床对凝胶火箭发动机工作过程的影响

为了研究相关喷注参数及催化床结构对凝胶火箭发动机燃烧室内流场及工作特性的影响，运用Fluent软件并基于DPM，k－ε标准湍流模型等，对具有不同催化床长度的单组元凝胶单推－3火箭发动机燃烧室内的工作过程进行了数值模拟；结果表明：催化床长度越长，由于氨气分解率的升高，燃烧室温度反而较低，燃烧室压力随之降低。推进剂液滴与催化床间的交互作用，如渗透距离，也对反应特性有相当重要的影响。

Numerical Simulation of Influence of Catalyst Bed on Working Process of Gelled Monopropellant Thrusters

In order to understand the influence of relative injection parameters and catalytic bed structure on the flow field and material distribution in the combustion chamber,the simulations to the different catalyst bed length were carried out by using the Fluent software based on the DPM model,the standard k-εturbulence model and so on.The results show that the chamber temperature and pressure decrease with a longer catalyst bed,due to a higher ammonia dissociation rate.The results also reveal that there is interaction between monopropellant and the catalyst bed,such as the liquid permeability,which has significant influences on the reaction characteristics.