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燃烧强化是在未燃烧的气体燃料或者可燃混合气中进行介质阻挡放电,从而提高燃料的点火性能、燃烧速度和稳定性等燃烧特性的一种技术。为此,利用一种同轴介质阻挡放电结构对甲烷进行放电,然后将处理后的甲烷与空气混合、燃烧。对甲烷气体做了多种频率下的介质阻挡放电处理,观察处理后的燃烧火焰,在电压逐步升高的情况下,研究电压对火焰的影响,以及通过各种频率下的对比得出频率对火焰的影响规律,并做了光谱实验进行分析。结果表明,火焰形态随电压和频率的不同而有区别,其中还发生了甲烷的转化反应,一些在甲烷燃烧过程中重要的光谱波段在放电后有较明显的提高。
Combustion enhancement is a technique that performs dielectric barrier discharge in unburnt gaseous fuel or combustible mixture, thereby improving the combustion characteristics such as ignition performance, combustion speed and stability of the fuel. For this purpose, methane is discharged using a coaxial dielectric barrier discharge structure, and then the treated methane is mixed with air and burned. Methane gas has been subjected to dielectric barrier discharge at various frequencies. The treated flame is observed and the effect of voltage on the flame is investigated as the voltage is gradually increased, and the frequency pair is found by comparing the frequencies Flames of the law of influence, and did spectral experiments for analysis. The results show that the shape of the flame is different with the voltage and frequency, and the methane conversion reaction also occurs. Some of the important spectral bands in the process of methane combustion increase obviously after discharge.