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首页> 外文期刊>Combustion Science and Technology >EFFECT OF CHEMICALLY INERT PARTICLES ON THERMODYNAMIC CHARACTERISTICS AND DETONATION OF A COMBUSTIBLE GAS
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EFFECT OF CHEMICALLY INERT PARTICLES ON THERMODYNAMIC CHARACTERISTICS AND DETONATION OF A COMBUSTIBLE GAS

机译：化学惰性粒子对可燃气体热力学特征和爆轰的影响

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摘要

An approximate model of chemical equilibrium in heterogeneous mixtures of a combustible gas with chemically inert solid or liquid particles has been suggested. It includes explicit algebraic formulas for the calculation of the molar mass of the gas, internal energy, and heat capacities of gas-particles mixture, and ordinary differential equations for the description of isentropic compression and adiabatic index of the system. The model can be also useful for the rough estimations of thermodynamic parameters of gaseous mixtures with particles of soot.rnAs an example of a possible application of the suggested model of chemical equilibrium, parameters of stationary one-dimensional detonation wave in gas-particles mixtures are calculated. The algorithm of estimation of detonation cell size in such heterogeneous mixtures is presented. Detonation wave parameters and cell size in the stoichiometric hydrogen-oxygen mixture with particles of W, Al_2O_3, and SiO_2 have been calculated. The results of the calculations of detonation parameters and cell sizes are used for analysis of the method of multi-front detonation wave suppression by particles injection before the leading shock front of the wave. The minimal total mass of the particles and characteristic size of the cloud, which are necessary for detonation suppression, have been calculated. It is shown that such suppression is more effective if the particles have high heat capacity, low melting point, and high heat of melting. Among the particles under consideration, the particles of Al_2O_3 are the best for the detonation wave suppression.
机译：已经提出了可燃气体与化学惰性固体或液体颗粒的多相混合物中化学平衡的近似模型。它包括用于计算气体的摩尔质量，内部能量和气体-颗粒混合物的热容量的显式代数公式，以及用于描述系统的等熵压缩和绝热指数的常微分方程。该模型还可以用于粗略估计带有烟灰颗粒的气态混合物的热力学参数。rn作为建议的化学平衡模型的可能应用的一个示例，气体-颗粒混合物中的固定一维爆轰波参数为计算。提出了估算这类异质混合物中爆轰孔尺寸的算法。计算了具有W，Al_2O_3和SiO_2粒子的化学计量氢氧混合物中的爆轰波参数和气泡尺寸。爆轰参数和像元大小的计算结果用于分析在波的前激波前沿之前通过粒子注入来抑制多前爆轰波的方法。已经计算出了爆轰抑制所需的最小粒子总质量和云的特征尺寸。已经表明，如果颗粒具有高的热容量，低的熔点和高的熔化热，则这种抑制是更有效的。在所考虑的粒子中，Al_2O_3粒子最适合抑制爆轰波。

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