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ADN(二硝酰胺铵盐)基单组元绿色推进技术是空间推进领域的国际研究热点,目前国内外对ADN基推进剂分解和燃烧过程缺乏统一、完善的燃烧动力学机理,尤其欠缺对推力器内部燃烧过程和关键中间产物定量信息的实验研究。本文通过发展先进中红外光谱诊断技术(QCLAS),实时诊断ADN基推进剂分解、燃烧反应中的CO,N_2O多种关键组分浓度、燃气温度等关键参数。推力器稳态点火测量结果验证了ADN推进剂催化分解和燃烧两步反应阶段理论研究,脉冲点火下组分浓度变化规律呈现与脉冲序列一致特性,验证了推力器正常工作的稳定性和可靠性。基于测量结果初步评估了ADN基推力器性能,特征速度达1130m/s,达到同类型肼推力器标准,验证了该绿色推力器良好的应用前景。
ADN (dinitramide ammonium salt) based single-component green propulsion technology is an international research hotspot in the field of space propulsion. At present, there is a lack of a unified and complete combustion kinetic mechanism for the decomposition and combustion of ADN-based propellant at home and abroad, Experimental Study on Internal Combustion Process and Quantitative Information of Critical Intermediates. In this paper, the advanced mid-infrared spectral diagnostic techniques (QCLAS) were developed to diagnose the key parameters of ADN-based propellant decomposition, concentrations of CO and N2O in combustion reactions, and gas temperature in real time. The results of steady-state ignition tests of thrusters validate the theoretical study of two-step reaction stages of catalytic decomposition and combustion of ADN propellant. The variation of component concentration under pulsed ignition presents the same characteristics with the pulse sequence, verifying the stability and reliability of the thruster during normal operation . Based on the measurement results, the performance of ADN-based thruster was preliminarily evaluated. The characteristic velocity reached 1130m / s, reaching the same type of hydrazine thruster standard, which verified the good application prospect of the green thruster.