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二维消光法在乙烯火焰碳烟浓度测量中的应用

, PP. 57-64

Keywords: 消光法,测试系统,碳烟,Abel变换,燃烧

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Abstract:

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。

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