摘要
基于硼氢盐化合物具有高燃速、高燃烧热值等优点,探索了两种十氢十硼酸金属盐化合物(BHM)在富燃料推进剂中应用前景。采用DCAT 21型动态接触角/表面张力仪测量了BHM、AP、Mg、团聚硼、HTPB的接触角,计算了固体组分与HTPB之间的粘合功W和铺展系数S,结果显示几种固体组分与HTPB粘合剂相互作用大小次序为AP/HTPB>BH-2/HTPB>团聚硼/HTPB>Mg/HTPB>BH-1/HTPB,且SHTPB/BH-1较小,因为BH-1不能充分浸润于HTPB粘合剂,界面间产生排斥作用,导致含硼氢盐BH-1推进剂内部出现裂纹。还研究了含硼氢盐BH-2富燃料推进剂的流变性能、能量性能和燃烧性能。结果表明,用硼氢盐BH-2替代团聚硼粉,能降低推进剂药浆的表观粘度和屈服值,提高推进剂实测热值,其中,BH-2含量30%的B-2配方,推进剂药浆的屈服值为44.5 Pa,表观粘度为188 Pa·s,燃烧效率达到了93.2%。发现硼氢盐使推进剂燃速降低,且产生大量的燃烧残渣,这与燃烧产物中凝聚相碳(C)的大幅增加有关。依据硼氢盐分解和燃烧特点,认为其适应于燃料冲压发动机。
Boron hydride salts have the advantages of high burning rate and high combustion heat. In this paper, the applicationprospects of two kinds of decahydrodecaborate metal salts(BHM) were investigated in fuel-rich propellants.The contact angles ofboron hydride salt,AP,Mg,agglomerated Boron and HTPB were measured by DCAT 21 dynamic contact angle/surface tension me-ter. The work of adhesion and spread coefficient between filler and HTPB were calculated.The results indicate that the order of inter-action between several solid components and HTPB binder is:AP/HTPB>BH-2/HTPB>agglomerated boron/HTPB>Mg/HTPB>BH-1/HTPB,andSHTPB/BH-1 is small.Because BH-1 can not be fully infiltrated by HTPB,and there is repulsion between the inter-faces,resulting in cracks inside the propellant containing BH-1.The rheological,energy and combustion properties of fuel-rich pro-pellants with BH-2 were investigated.The results show that the replacement of agglomerated boron powder with boron hydride saltBH-2 can reduce the apparent viscosity and yield value of slurries and increase the tested calorific value of propellants.For the B-2 formula with 30% BH-2,the yield value of propellant slurry is 44.5 Pa,the apparent viscosity is 188 Pa·s,and the combustion effi-ciency is 93.2%.It is found that the boron hydrogen salt reduces the burning rate of propellants and produces a large amount of com-bustion residue,which is associated with a substantial increase of condensed phase C in the combustion products.According to thecharacteristics of decomposition and combustion of boron hydride salts,it is considered to be suitable for fuel ramjet engines.
作者
胥会祥
黄永刚
李勇宏
庞维强
李军强
薛云娜
周文静
赵凤起
龚建良
XU Huixiang;HUANG Yonggang;LI Yonghong;PANG Weiqiang;LI Junqiang;XUE Yunna;ZHOU Wenjing;ZHAO Fengqi;GONG Jianliang(Xi’an Modern Chemistry Research Institute,Xi’an 710065,China;Sichuan Aerospace South Sichuan Pyrotechnical Technology Co.,Ltd.,Luzhou 646000,China;Science and Technology on Combustion Laboratory,Xi’an 710065,China)
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2020年第3期310-316,共7页
Journal of Solid Rocket Technology
基金
装备预先研究项目(41420030302)。
关键词
物理化学
富燃料推进剂
硼氢盐
流变性能
燃烧性能
physical chemistry
fuel-rich propellants
boron hydride salt
rheological property
combustion property