中文摘要：

设计并搭建了一套基于消光法的碳烟浓度二维测试系统，该系统装置简单，操作方便。将一束亮度均匀的平行光射入乙烯火焰，衰减后在CCD上成像。通过入射前后的光强对比，再结合有效的层析反演算法，可准确获取乙烯扩散火焰中的碳烟浓度分布。通过对反演算法程序进行抗噪声数值模拟，检验了反演算法的可信度。试验结果显示乙烯火焰中的碳烟最浓区分布在火焰的外侧，其浓度随火焰高度先不断增大，达到最大值后，由于氧化作用的主导开始逐渐降低，直至完全消失；通过将测量结果与国外试验数据进行对比，发现差距很小，验证了该系统的有效性。

英文摘要：

A two-dimensional measurement system was designed and built based on light extinction with effective tomographic inversion algorithm for accurate measurement of soot concentration distribution in a co-flow laminar ethylene diffusion flame. It operated simply. A collimated light with brightness uniformity passing through the ethylene flame would image in the CCD. An anti-noise numerical simulation ensured the credibility of the inversion algorithm. Test results show that the maximum soot concentration is in the annular region of the flame. The soot concentration increases with flame height until reaches its maximum and then decreases till it vanishes at the visible flame tip. The results are in good agreement with those reported in the literature, indicating the present two-dimensional light extinction system is effective and correctly implemented.