中文摘要：

采用数字图像采集系统在煤粉燃烧实验锅炉中采集湍流火焰图像,利用形态学图像处理技术提取火焰热混合层的分形特征,研究了一次、二次和三次风量对火焰热混合层分形特征的影响.研究表明,火焰热混合层分形维数与一次、二次和三次风量呈现出规律的相关性,因此有可能根据火焰热混合层分形维数变化来调整一次风量与二次风/三次风量的比值,为燃烧过程的优化与控制提供参考.

英文摘要：

The images of turbulent flame were acquired by using a digital imaging system on an industry-scale pulverized coal-fired test rig. The fractal dimensions of thin thermal mixing layers in flame were computed through morphology-based flame image processing techniques. The effects of the ratios of primary air and secon-dary/tertiary air on fractal dimensions were characterized. The results presented in this work show that the varia-tions of fractal dimension are closely related to the ratio changes of primary air and secondary/tertiary air. Therefore,the fractal dimensions of flame thin thermal mixing layers can be used as an important indicator for the control and optimization of a combustion process.