Experimental investigations of the spray structure and interactions between sectors of a double-swirl low-emission combustor
Experimental investigations of the spray structure and interactions between sectors of a double-swirl low-emission combustor
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DOI：
10.1016/j.cja.2019.09.009
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发表时间：
2020-02
影响因子：
5.7
通讯作者：
Xiongjie Fan;Cunxi Liu;Gang Xu;Chi Zhang;W. Jianchen;Yuzhen Lin
中科院分区：
文献类型：
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作者：
Xiongjie Fan;Cunxi Liu;Gang Xu;Chi Zhang;W. Jianchen;Yuzhen Lin
在光学三扇区燃烧室试验台上，利用粒子成像测速技术（PIV）和平面激光诱导荧光技术（PLIF）对双旋流低排放燃烧室的喷雾特性进行了研究。阐述了扇形区之间的相互作用和主级旋流强度对喷雾结构的影响。结果表明，旋流强度对喷雾流场和喷雾结构有很大的影响。旋流数为0.7、0.9时的喷雾锥角大于旋流数为0.5时的喷雾锥角。旋流数为0.5时，燃油分布区较大，分布较均匀。在侧部扇区的中心平面（平面5）的中心区域中的燃料浓度大于中间扇区的中心平面（平面1）的燃料浓度。平面5中的喷雾锥角大于平面1中的喷雾锥角。随着空燃比的增大，喷雾锥角增大，但不同空燃比下的喷雾锥角基本相同。研究结果可为新型低排放燃烧室的设计提供理论依据。
In this paper, the spray characteristics of a double-swirl low-emission combustor are analyzed by using Particle Imaging Velocimetry (PIV) and Planar Laser Induced Fluorescence (PLIF) technologies in an optical three-sector combustor test rig. Interactions between sectors and the influence of main stage swirl intensity on spray structure are explained. The results illustrate that the swirl intensity has great effect on the flow field and spray structure. The spray cone angle is bigger when the swirl number is 0.7, 0.9 than that when the swirl number is 0.5. The fuel distribution zone is larger and the distribution is more uniform when the swirl number is 0.5. The fuel concentration in the center area of the center plane of side sector (Plane 5) is larger than that of the center plane of middle sector (Plane 1). The spray cone angle in Plane 5 is larger than that in Plane 1. The width of spray cone becomes larger with the increase of Fuel–Air Ratio (FAR), whereas the spray cone angle under different fuel–air ratios are absolutely the same. The results of the mechanism of spray organization in this study can be used to support the design of new low-emission combustor.