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利用高速摄像系统,结合三色测温法和图像处理技术,研究了运动火源扩散火焰二维温度场受速度、加速度影响的变化规律.提出一种可实现测量此类直线运动火源扩散火焰二维温度场的方法,并提取运动火焰温度信息,分析了速度和加速度参数影响运动火源瞬态温度场特征的变化规律,实时获取了直线运动火源扩散火焰的瞬态运动图像序列.结果表明:同一加速度条件下,运动火焰区域平均温度的变化规律经历三个不同速度的变化阶段.不同加速度条件下,运动火焰区域平均温度、最高温度随速度的变化规律具有相似性.此测温方法可解决直线运动火源扩散火焰温度场重建问题,为研究运动火源燃烧机理提供了一种新的分析方法.
By using the high-speed camera system, combined with the three-color temperature measurement and image processing technology, the variation law of the two-dimensional temperature field caused by the motion source diffusion flame under the influences of velocity and acceleration was studied. Two-dimensional temperature field and the temperature information of the flame were extracted, and the changing rules of the transient temperature field of the kinetic source of fire were analyzed by the influence of velocity and acceleration parameters, and the instantaneous moving image sequence of the linear flame was obtained. The results show that under the same acceleration, the variation law of the average temperature in the area of motion flame undergoes three stages of different velocity changes.Under the different acceleration conditions, the variation law of the average temperature and the maximum temperature with the velocity of the moving flame zone are similar. Which can solve the reconstruction problem of the temperature field of linear flame source diffusion flame and provide a new analytical method for studying the combustion mechanism of kinetic flame source.