旋流强度对双旋流燃烧室雾化特性影响  

Study on the effect of swirl intensity for atomization characteristics in two-stage swirl combustor

作　　者：高亚平 刘存喜[3,4] 郑昭卓 梅德清 王少林[3,4] 刘富强 徐纲[3,4] GAO Yaping;LIU Cunxi;ZHENG Zhaozhuo;MEI Deqing;WANG Shaolin;LIU Fuqiang;XU Gang(School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang Jiangsu 212013,China;No.5 Military Representative Office in Beijing of Military Representative Bureau of Air Force Armament Department,Beijing 101300,China;Laboratory of Light-Duty Gas-Turbine,Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China;School of Aeronautics and Astronautics,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013 [2]空装驻北京地区第五军事代表室,北京101300 [3]中国科学院工程热物理研究所轻型动力重点实验室,北京100190 [4]中国科学院大学航空宇航学院,北京100049

出　　处：《航空动力学报》2024年第12期267-276,共10页Journal of Aerospace Power

基　　金：国家科技重大专项(J2019-Ⅲ-0005-0048,2017-Ⅲ-0007-0032)。

摘　　要：基于粒子图像测速法(particle image velocimetry,PIV)、平面激光散射方法(planar laser scattering,PLS)和高速喷雾粒度仪研究了不同旋流强度下预膜式空气雾化喷嘴的雾化特性,总结了燃油空间分布、喷雾锥角、液滴粒径等参数随旋流强度的变化规律。结果表明:随内级旋流强度增加,旋流器出口处气流轴向速度降低,喷雾雾锥的轴向长度、径向宽度、喷雾锥角以及液滴粒径均呈现先增加后降低的趋势;随外级旋流强度自0.695增加至0.987,中心回流区起始于轴向距离70 mm的位置。内级旋流强度较弱时,喷雾锥角随外级旋流强度增加而增加,液滴粒径随外级旋流强度增加先减小后增加;内级旋流强度较强时,喷雾锥角、液滴粒径随外级旋流强度增加而增加。研究结果解释了预膜式空气雾化喷嘴在不同旋流强度下喷雾性能的演变规律,为改善旋流燃烧室雾化性能提供理论支撑。Based on particle image velocimetry(PIV),plane laser scattering(PLS)and high speed granulometer,the atomization characteristics of prefilming air-blast atomizer under different swirl intensities were studied.The variation laws of fuel spatial distribution,spray cone angle and fuel particle size with swirl intensity were summarized.It was found that with the increase of the Sni,the axial velocity of the airflow at the outlet of the swirler decreased.Meanwhile,the axial length and radial width of the spray cone increased first and then decreased,and the spray cone angle and droplet diameter also showed the same trend.The central recirculation zone occurred within the Sno range from 0.695 to 0.987,whose starting position was X=70 mm.When the Sni was weak,the spray cone angle increased with the increase of Sno,and the droplet diameter decreased first and then increased with the increase of Sno.When Sni was strong,spray cone angle and droplet diameter were positively correlated with Sno.The results showed that the evolution law of spray characteristics of prefilming air-blast atomizer under different swirl intensities was explained,which could provide a theoretical support for improving atomization performance of swirl combustor.

关 键 词：旋流强度 燃油分布 喷雾锥角 液滴粒径 预膜式空气雾化喷嘴 光学诊断测量 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]