【摘要】 用高压DSC和Π型钨铼微热电偶实验研究了5种燃烧稳定剂(Al2O3、ZrB2、ZrO2、SiC、WC)对RDX-CM-DB推进剂的热分解特性及燃烧波温度分布的影响。结果表明,随着压力的升高,RDX-CMDB推进剂的两个特征分解峰温降低,分解热增加。相同压力下,5种燃烧稳定剂对两个特征峰温的影响不大,但对分解热影响显著,其影响程度为ZrO2和WC最大(甚至能将5MPa下的分解热提高28%以上),Al2O3次之,ZrB2、SiC最小;不同燃烧稳定剂对RDX-CMDB推进剂燃烧的作用区间不同,ZrO2和WC主要作用于固相反应区及嘶嘶区,Al2O3则作用于气相区,使作用区域的放热量及温度梯度明显提高。更多还原

【Abstract】 The effects of five combustion stabilizers including Al2O3,ZrB2,ZrO2,SiC and WC on the thermal decomposition characteristics and the combustion wave temperatures of RDX-CMDB propellant were studied by PDSC and Π mode miniature W/Rt thermocouples.The results show that as pressure increasing,the two decomposition peak temperatures in RDX-CMDB propellant decrease and the decomposition heat increases.Under the same pressure,the influence of the five combustion stabilizers on the two decomposition peak temperatures is inconspicuous,and the influence on the decomposition heat is obvious.The influence of ZrO2 and WC is the most obviously,and the decomposition heat can be enhanced more than 28 percent at the pressure of 5 MPa.The influence of Al2O3 is slightly apparent and the influence of ZrB2 and SiC is unapparent.The combustion positions of the five combustion stabilizers acting on the RDX-CMDB propellant are different.The ZrO2 and WC stabilizers mainly act on the condense phase reaction zone and fizz zone of RDX-CMDB propellant,while the Al2O3 stabilizer acts on the gas phase zone of RDX-CMDB propellants.更多还原