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根据吉布斯能最小原理,利用FactSage计算了B/O体系和B/C/H/O体系的热平衡,研究了温度、压强和物质摩尔比对平衡的影响。计算结果表明,B/O体系下,当B/O摩尔比为2∶3时,随温度逐渐升高,主要的气相含硼燃烧产物由B2O3(g)转变为BO(g)和BO2(g);提高环境压强,有助于增大硼燃烧的热量释放;当温度为2 400 K恒定的情况下,贫燃料时的主要产物为B2O3(g)和BO2(g),富燃料时的主要产物为B2O3(g)、BO(g)和B2O2(g)。在B/C/H/O体系中,把B/C/H/O摩尔比定为2∶1∶2∶6,在温度相对较低时,B/C/H/O体系燃烧的主要产物为HBO2(g)、CO2(g)、H2O(g)和B2O3(g),此时燃料的热释放比较完全。随温度升高,之前的燃烧产物被CO(g)、BO(g)等低热释放的物质代替,说明外界温度太高不利于燃料燃烧的热量释放;同样,提高环境压强,有助于增大系统的热量释放;当温度为2 400 K恒定的情况下,贫燃料时的主要产物为HBO2(g)、B2O3(g)和BO2(g),富燃料时的主要产物为B2O3(g)、B2O2(g)、BO(g)和HBO(g)。
According to the Gibbs energy minimization principle, the heat balance of B / O system and B / C / H / O system was calculated by FactSage. The effects of temperature, pressure and molar ratio on the equilibrium were studied. The calculated results show that the main product of the combustion of boron-containing gas in the B / O system changes from B2O3 (g) to BO (g) and BO2 (g ). Increasing the ambient pressure helps to increase the heat release from boron combustion. When the temperature is 2 400 K constant, the main products at lean burn are B2O3 (g) and BO2 (g) The product is B2O3 (g), BO (g) and B2O2 (g). In the B / C / H / O system, the B / C / H / O molar ratio is set at 2: 1: 2: 6 and at a relatively low temperature, For the HBO2 (g), CO2 (g), H2O (g) and B2O3 (g), when the fuel heat release more complete. As the temperature increases, the previous combustion products are replaced by low heat release materials such as CO (g), BO (g), etc., indicating that the outside temperature is too high, which is not conducive to the heat release from the combustion of the fuel. Similarly, increasing the ambient pressure helps to increase (G), B2O3 (g) and BO2 (g) were the main products when the fuel was lean, and the main products when rich were B2O3 (g) B2O2 (g), BO (g) and HBO (g).