CAJ | 학술논문

利用低温标记示踪和红外测温成像的方法对一种适用于石油焦粉工业锅炉的富氧燃烧器进行了冷态流场特性的研究。通过对红外图像的处理，分析射流温度场的分布情况，揭示了燃烧器的流场混合特性。实验结果表明，该燃烧器具有良好的空气动力场，一次风径向温度速度梯度较大，主流轴向温度速度梯度小，纯氧射流刚性强且与一次风混合距离合理；燃烧器高速一次风射流的流场混合效果受扩口和中心管钝体影响显著，轴线温度、射流扩展角和射程、中心回流区均呈现一定变化规律。
이용저온표기시종화홍외측온성상적방법대일충괄용우석유초분공업과로적부양연소기진행료랭태류장특성적연구。통과대홍외도상적처리，분석사류온도장적분포정황，게시료연소기적류장혼합특성。실험결과표명，해연소기구유량호적공기동력장，일차풍경향온도속도제도교대，주류축향온도속도제도소，순양사류강성강차여일차풍혼합거리합리；연소기고속일차풍사류적류장혼합효과수확구화중심관둔체영향현저，축선온도、사류확전각화사정、중심회류구균정현일정변화규률。
The characteristics of cold flow field of an oxygen-enriched burner was studied that was applicable to petroleum coke powder industrial boiler. Low temperature tracer method and Infrared imaging temperature measurement were applied. Through the infrared imaging processing and jet temperature field analyzing, this paper revealed the mixing characteristics of flow field outside the burner. Experimental results indicate that, the burner has good aerodynamic field, the primary air has a bigger radial, whereas smaller axial temperature-speed gradient, and pure oxygen jet has a strong rigidity and it keeps a reasonable mixing distance from the primary air. The mixing effect of primary air’s flow field in the high-speed air jet burner is obviously influenced by the blunt body flaring and center pipe. Meanwhile, axis temperature, jet expansion angle, range, and center reflux area of the primary air all also present certain changing rules separately.