膏体推进剂近燃面区域的热解与燃烧过程  

Study on the Pyrolysis and Combustion Process of Pasty Propellant Near Burning Surface Region

作　　者：单新有 李映坤 许进升[1] 朱敏 陈雄[1] 何勇[1] SHAN Xin-you;LI Ying-kun;XU Jin-sheng;ZHU Min;CHEN Xiong;HE Yong(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;China North Industries Corporation,Beijing 100053,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094 [2]中国北方工业有限公司,北京100053

出　　处：《火炸药学报》2024年第9期830-839,I0004,共11页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金(No.52006099);中央高校基本科研业务费专项资金资助(30920021102)。

摘　　要：针对膏体推进剂的近燃面区域热解与燃烧过程,对膏体推进剂进行了激光点火燃烧实验,同时基于课题组自主开发的多相化学反应数值求解器,结合14组分14基元化学反应方程对膏体推进剂近燃面区域的热解和燃烧特性进行了研究;通过实验得到推进剂燃烧火焰的宏观结构并测量恒压条件下膏体推进剂燃烧速率;通过数值计算分析了膏体推进剂恒压条件下燃烧火焰结构和化学反应次序,同时计算了不同环境压力对膏体推进剂的燃烧过程的影响。结果表明,拟合得到的压力燃烧速率曲线与实验结果吻合较好,在实验压力范围内,对膏体火箭发动机燃烧室内推进剂的燃烧速率具有较好的预测能力;膏体推进剂燃烧最先发生的反应是AP的分解,而较高的环境压力限制了一次燃烧气体的扩散,但增强了对膏体域的热反馈效应,提高了膏体推进剂的燃烧速率。Aiming at the pyrolysis and combustion process of the near burning surface of the pasty propellant,the laser ignition combustion experiment of the pasty propellant were carried out.At the same time,the pyrolysis and combustion characteristics of the near burning surface region of the pasty propellant were studied based on the multiphase chemical reaction numerical solver developed by the research group and the 14-component and 14-primitive chemical reaction equation.The macroscopic structure of propellant combustion flame was obtained through experiments and the burning rate of the pasty propellant was measured under constant pressure conditions.The combustion flame structure and chemical reaction sequence of the pasty propellant under constant pressure conditions were analyzed by numerical calculations.The effects of different ambient pressure on the combustion process of the pasty propellant were calculated.The results show that the fitted burning rate curve was in good agreement with the experimental results.In the range of experimental pressure,the burning rate of propellant in the combustion chamber of pasty rocket engine could be predicted well.The decomposition of AP is the first reaction in the combustion of pasty propellant,and the higher ambient pressure limited the diffusion of primary combustion gases,but enhanced the thermal feedback effect on the pasty domain,which increased the burning rate of the pasty propellant.

关 键 词：物理化学 膏体推进剂 膏体火箭发动机 计算流体力学 燃烧动力学 燃烧过程 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] V512[航空宇航科学与技术—航空宇航推进理论与工程]