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燃烧火焰温度是固体推进剂等重要参数,本文研究了基于分子转-振光谱精细结构的火焰温度遥测方法。根据分子转-振光谱线的展宽机制,研究了分子谱线线型。结合朗伯-比耳吸收定律,去除谱线中心受大气低温气体吸收影响较大的数据点后,利用谱线两翼的数据点进行谱线线型拟合,利用分子转-振光谱精细结构温度遥测方法将经拟合修正后数据反演火焰温度,使得分子转-振光谱精细结构法遥测的火焰温度更为准确。采用加拿大Bomem公司的MR-154傅里叶变换红外光谱仪测量了酒精灯火焰红外发射谱,并根据火焰中水汽的转-振光谱精细结构反演了酒精灯火焰温度为415℃,位于酒精灯火焰温度范围(400—500℃)之内。
Combustion flame temperature is an important parameter such as solid propellant. In this paper, the flame temperature telemetry method based on the fine structure of molecular rotation-vibration spectroscopy is studied. According to the broadening mechanism of molecular rotation - vibration spectra, the molecular spectral lines are studied. Combined with the Lambert-Beer’s law of absorption, after removing the data points where the center of the line is greatly affected by atmospheric low-temperature gas absorption, the data of the two wings of the line are used to fit the line shape. Telemetry method will be fitted and corrected data inversion flame temperature, making molecular-vibration spectroscopy fine structure method of telemetry flame temperature more accurate. The infrared emission spectrum of the alcohol lamp was measured by MR-154 Fourier transform infrared spectrometer (Bomem) of Canada. The flame temperature of the alcohol lamp was inverted to 415 ℃ according to the fine structure of the vapor- Temperature range (400-500 ℃) within.