Experimental and numerical studies of ammonium dinitramide based liquid propellant combustion in space thruster
Experimental and numerical studies of ammonium dinitramide based liquid propellant combustion in space thruster
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空间推进器二硝酰胺铵基液体推进剂燃烧实验与数值研究
DOI：
10.1016/j.ast.2017.05.035
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发表时间：
2017-10-01
影响因子：
5.6
通讯作者：
Yao, Zhaopu
中科院分区：
文献类型：
--
作者：
Jing, Liyue;You, Xiaoqing;Yao, Zhaopu
本文对液体推进剂二硝酰胺铵（ADN）-甲醇水溶液在小型空间推力器中的燃烧过程进行了实验研究和数值模拟。采用相位多普勒风速仪测量喷射过程，并将测量结果作为模拟中的液体边界条件，以减小不确定性。还进行了热点火试验，以估计推进器的性能。为了模拟推力器内的复杂过程，考虑液滴与多孔介质之间的相互作用，采用改进的多组分液滴模型来模拟蒸发过程。多孔介质的非平衡模型被用来描述在催化剂床的传热。采用包含18个组分和40个反应的简化化学机理模拟了气相ADN和甲醇的反应。结果表明，ADN的分解和甲醇的氧化在反应室中并不同时发生。ADN的分解发生在入口附近，而甲醇在多孔介质的下游被氧化。推力器中压力的建立取决于蒸发和反应过程，并且温度变化相对较慢，因为多孔介质增加了整个系统的热惯性。(C)2017年Elsevier Masson SAS。All rights reserved.
In this paper, the combustion process of liquid propellant ammonium dinitramide (ADN)-methanol aqueous solution in a small space thruster is investigated experimentally and numerically. The phase Doppler anemometer measurement is used to investigate the injection process and the results are used as the liquid boundary condition in the simulation to minimize uncertainties. Hot fire tests have also been operated to estimate the performance of the thruster. To simulate the complicated processes in the thruster, a modified multi-component droplet model is employed to simulate the evaporation process considering the interaction between the liquid droplet and the porous media. A non-equilibrium model for the porous media is used to describe the heat transfer in the catalyst bed. A reduced chemical mechanism containing 18 species and 40 reactions is used to simulate the reactions of gas-phase ADN and methanol. The results show that the decomposition of ADN and the oxidization of methanol do not happen synchronously in the chamber. The decomposition of ADN takes place near the inlet while methanol is oxidized downstream of the porous media. The establishment of pressure in the thruster depends on the evaporation and reaction processes and the temperature changes relatively slowly because the porous media increases the thermal inertia of the whole system. (C) 2017 Elsevier Masson SAS. All rights reserved.