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在粉煤燃烧规律研究中,有些物性及工况参数的影响,目前还很难完全利用物理模型进行直接准确的测定。本文是在对四种不同结构的粉煤旋风燃烧器模型的多温三维流场测试的基础上,对流场测试结果进行优化处理,得出四种情况下的流场速度分布规律的拟合函数式;而后分析了颗粒在气相场内的受力情况,建立了粉煤颗粒在三维流场内运动轨迹的数学模型;把测试结果与数学模拟结合起来,籍助计算机,计算并考察了不同粒度和密度的粉煤颗粒在某些初始条件下的运动轨迹;研究了四种结构燃烧器在不同物理条件和初始条件下的粒子运动变化规律及其着壁条件。
In the study of pulverized coal combustion law, some physical properties and working conditions parameters, it is still difficult to fully use the physical model for direct and accurate determination. Based on the multi-temperature three-dimensional flow field test of four different models of pulverized coal cyclone combustor, the flow field test results are optimized and the fits of the four kinds of flow velocity distribution are obtained Then the mathematical model of particle trajectory in the three-dimensional flow field is established. The test results are combined with the mathematical simulation. With the assistance of computer, Particle size and density of pulverized coal particles in some initial conditions of the trajectory of movement; four kinds of structural burners in different physical conditions and initial conditions of particle movement law and wall conditions.