基于图像处理技术的炉窑内生物柴油火焰特性研究

Flame Characteristics of Biodiesel in Industrial Furnace Based on Image Processing

摘要:

通过高速摄影利用图像处理技术研究生物柴油在炉窑内的燃烧火焰特性，分别对火焰体积、形状和结构、长度进行了研究。结果表明：增大空气过剩系数α，火焰体积逐渐减小，火焰变形越来越严重；增加雾化压力p，火焰体积先增大后减小，火焰变形越来越严重，火焰结构越来越分散；对火焰实际长度进行计算，在0.2s时间内火焰长度波动范围很大，呈现出突增与突降的规律，存在“脱焰过程”。火焰长度与空气过剩系数α成反比，随着雾化压力p的减小，火焰长度曲线变化趋势平缓。

Abstract:

The flame characteristics of biodiesel burning in industrial furnace were studied. The volume, shape, structure of flame and length were analyzed based on image processing by using high-speed photography method. The experimental results showed that with the increase of excess air coefficient α, the volume of flame gradually decreased and the flame deformation was more and more serious. With the increase of atomization pressure p, the volume of flame first increased and then decreased. The flame deformation was more and more serious, and the flame structure was more and more fragmented. Through the calculation, the range of the actual length of the flame of 0.2s was very large, which emerged a sudden increase and drop rule, existed a “taking off the flame” process. The flame length became inversed to the excess air coefficient α. Along with the decrease of the atomization pressure p, the curve of flame length changed gently.