重力加速度对燃烧过程影响的数值模拟研究

重力对燃烧过程有着很重要的影响,但是在燃烧各理论模型中往往被忽略。建立三维燃烧器模型,采用数值模拟的方法,考察了正常重力和微重力环境下炉膛内温度场的变化规律、热力型NO浓度分布规律和流场的变化情况。经计算分析表明,在正常重力和微重力环境下高温区的形状,炉膛内的温度场,火焰的传播速度,污染物的生成浓度和流场等都发生了很大的变化。这将有助于探索重力因素对燃烧过程的影响,更进一步了解燃烧过程的基本规律和机理,对改进燃烧模型有重要的意义。

Abstract：

Gravity has a significant impact on the combustion process; however, it is often overlooked during the various combustion theoretical models. Three-dimensional model of reverberatory furnace was set up; the numerical simulation was used to study the changing law of temperature field, concentration distribution of thermal NO and flow field in a refining reverberatory under the conditions of the normal gravity and microgravity environment. As a result of calculation and analysis, the flame shape, temperature inside the furnace, flame propagation speed, pollutants generated concentration and flow field have taken place in great changes. This will help to explore the gravitational effects of factors on the combustion process, better understanding the basic laws and mechanism of the combustion process and it has important implications for improving the combustion model.

Numerical Simulation Study about Acceleration of Gravity Impacting on Combustion Process

Gravity has a significant impact on the combustion process; however, it is often overlooked during the various combustion theoretical models. Three-dimensional model of reverberatory furnace was set up; the numerical simulation was used to study the changing law of temperature field, concentration distribution of thermal NO and flow field in a refining reverberatory under the conditions of the normal gravity and microgravity environment. As a result of calculation and analysis, the flame shape, temperature inside the furnace, flame propagation speed, pollutants generated concentration and flow field have taken place in great changes. This will help to explore the gravitational effects of factors on the combustion process, better understanding the basic laws and mechanism of the combustion process and it has important implications for improving the combustion model.