一种测量发光火焰温度的数据处理方法研究

Research on the data processing method of the luminous flame temperature

火焰温度是燃烧诊断的重要参数之一,它对研究各种燃烧过程具有重要价值。根据多光谱辐射测温所用的参考温度数学模型,提出了一种基于遗传算法的新的数据处理方法。该方法对火焰发射率与波长的关系依次进行了三点直线拟合,并通过遗传算法进行了优化,从而得到了发光火焰的温度和发射率。采用多波长高温计测量了某种固体推进剂燃烧火焰的自辐射光谱,并进行了数据处理。计算结果表明:火焰温度计算值与理论值之差在±100K以内;这种基于遗传算法的新的数据处理方法是测量发光火焰温度的一种可行性方法。

Flame temperature measurement is very important in combustion diagnostics and is useful for determining the various combustion processes. According to the reference temperature model of multi-spectral thermometry, a kind of new data processing technique based on genetic algorithm （GA） was introduced. The relationship between the emissivity and wavelength of the flame was linearly fitted at three points in turn and optimized by GA to obtain the temperature and the emissivities of the flame. The self-radiation spectrum of the combustion flame of a solid propellant was measured using a multi-wavelength pyrometer. The results show that the temperature differences between the calculated values and the theoretical values are within ±100K. Therefore, this method is a practical method for measuring the luminous flame temperature.