高海拔下油盆火烟气辐射特性研究

结合模拟气体辐射特性的统计窄带模型和模拟烟黑(Soot)辐射特性的Mie氏散射理论,对高海拔下油盆火烟气的辐射特性进行研究。得到了实验装置中不同位置的气体浓度、烟黑浓度、烟气的发射率等数据。将模拟得到的辐射特性用于实验油盆火的燃烧过程计算,温度的计算结果与实验结果吻合较好,轴线方向平均温度的最大相对误差为12.6%;烟气的发射率与温度、烟气成分等因素相关。研究结果表明应用该方法可以对高海拔下油盆火的烟气辐射特性进行较为准确的研究和分析。

Research on Smoke Radiation Characteristics of Circle-Pan Fire under High Altitude

Smoke radiation characteristics of circle-pan fire under high altitude were researched using the method combined with statistical narrow band model for gases and Mie scattering theory for soot. The combustion and smoke parameters, such as gases concentration, soot concentration, smoke emissivity, were simulated, and compared with experimental results in the reference. The calculated radiation characteristics were used in the combustion process of experimental pan fire. Results show that temperature distributions fit well with experimental data, the maximum relative error of average temperature at axis direction is within 12.6%. Smoke emissivity is depended on temperature and smoke components. The proposed method can be used in the research of smoke radiation characteristics of circle-pan fire under high altitude.