三基发射药热烧蚀特性及变化规律

Thermal Erosion Characteristics and Variation Law of Triple Base Propellant

为了研究三基发射药热烧蚀特性及变化规律,制备了组分含量不同的多种三基发射药,采用半密闭爆发器模拟烧蚀试验方法测定发射药样品的烧蚀性,分析了发射药高能组分含量、增塑剂含量对发射药爆温的影响规律,以及发射药爆温对烧蚀特性的影响规律。结果表明,环三亚甲基三硝胺(RDX)、硝基胍(NQ)、邻苯二甲酸二辛酯(DOP)含量改变会引起发射药爆温的变化,进而影响烧蚀性能。RDX含量增加1%,爆温增加0.59%,发射药烧蚀率增加1.23%;与未加入RDX相比,加入2%RDX的发射药烧蚀率增加23.38%;NQ含量增加1%,爆温降低0.23%,发射药烧蚀率降低0.56%;DOP含量增加1%,爆温降低2.99%,发射药烧蚀率降低7.01%。针对爆温在2600~3100 K的范围内的三基发射药,建立了质量烧蚀率与爆温的指数关系式,并分别给出了RDX、NQ、DOP体系的特征系数,为0.106、0.101、0.163。

In order to investigate the thermal erosion characteristics and variation law of triple base propellant,various kinds of gun propellants with different components content were prepared.The erosion characteristics were determined through simulated test in a semi-closed bomb.The analysis reveals the impact of energy component and plasticizer content on gun propellant explosion temperature,and the impact of explosion temperature on erosion characteristics.The results indicate that changes in the explosion temperature of gun propellant,attributed to variations in cyclotrimetheylenetrinitramine(RDX),nitroguanidine(NQ)and dioctyl phthalate(DOP)content,significantly affect erosion characteristics.An increase of 1%in RDX content results in an increase in explosion temperature by 0.59%and an increase in erosion rate by 1.23%.Compared with the absence of RDX,the erosion rate of 2%RDX-containing propellant increase 23.38%.Notably,an increase of 1%in NQ content reduces the explosion temperature by 0.23%and the erosion rate by 0.56%.An increase of 1%in DOP content reduces the explosion temperature by 2.99%and the erosion rate by 7.01%.For the triple base propellants within the range of explosion temperature from 2600-3100 K,an exponential relationship between the rate of erosion mass and explosion temperature is established,and characteristic coefficients of RDX,NQ,DOP system is given respectively,which is 0.106,0.101,0.163.