镁粉对含硼富燃料推进剂能量释放特性的影响

Effect of Mg powder on the energy release property of boron-based fuel-rich propellants

为考察辅助金属燃料Mg对含硼富燃料推进剂能量释放特性的影响,采用氧弹量热计分别测定了Mg、Al和Ti的燃烧热,以及相应含硼富燃料推进剂的爆热Qv和燃烧热Hv,计算得出了推进剂在燃烧过程中的三个能量释放效率ηc1、ηc2和ηB。结果表明,Mg通过自身的低耗氧、高放热提高了含硼富燃料推进剂的爆热,进而提高了一次燃烧温度,为硼粉燃烧营造了一个较合适的高温环境,促进了硼粉的燃烧,因而明显提高了含硼富燃料推进剂的ηc1、ηc2和ηB。因此,在含硼富燃料推进剂中,采用B+Mg的主辅燃料组合是较佳选择。

To investigate the effect of auxiliary metal fuel Mg powder on the energy release characteristics of boron-based fuelrich propellants,the combustion heat（ Hv） of three typical metal fuels,Mg,Al and Ti powder,as well as the explosion heat（ Qv）and heat of combustion（ Hv） of the propellant containing these auxiliary metal fuels were measured by oxygen bomb calorimeter,based on which the energy releasing efficiency ηc1,ηc2 and ηBwere calculated eventually.The results indicate that the explosion heat of the boron-based fuel-rich propellant containing Mg powder is boosted due to its lower oxygen consumption and higher heat release.The primary combustion temperature has been increased,which provides a suitable high temperature enviornment for the combustion of boron powder.As a result,the combustion of boron powder is promoted,and the energy release efficiency ηc1,ηc2 and ηBare elevated significantly.Therefore,the combination of B/Mg is a favorable for the fuel compositions of boron-based fuel-rich propellants.