摘要
对某中心分级燃烧室头部的三种型号离心喷嘴副油路燃油喷入静止大气中的雾化特性进行了试验研究,获得了不同进口燃油温度(-40~80℃)和供油压差对燃油雾化特性的影响规律。利用相位多普勒粒子测量技术(PDPA)测量了沿流向距离离心喷嘴出口30 mm平面上的油雾特性,并利用激光粒度分析仪对试验结果进行了进一步验证。研究结果表明:①离心喷嘴的流量数随燃油温度的升高而逐渐减少,且在低温段下降幅度更大;②测量平面上沿直径各处的Sauter平均直径(SMD)在低温段随燃油温度的升高而减小,且油锥中心处的SMD下降幅度更大;③利用激光粒度分析仪测得的油雾场粒径分布在一定程度上验证了PDPA测量结果的正确性,液滴特征直径和液滴尺寸分布系数随供油压差的增大而减小。
The atomization characteristics of three types of centrifugal nozzles’injection into static atmosphere at the head of a central staged combustion chamber’s auxiliary oil passage were experimentally studied.The influences of different injected fuel temperature(-40~80℃)and fuel supply pressure difference on the fuel atomization characteristics were obtained.Phase Doppler particle anemometry(PDPA)was used to measure the spray mist characteristics on the plane 30 mm away from the nozzle exit along the flow direction,and the laser particle size analyzer was used to further verify the experimental results.The results of the experimental study were given as follows:(1)the flow number of the centrifugal nozzle gradually decreased with the increase of the fuel temperature,and decreased sharper in the low temperature section.(2)The Sauter mean diameter(SMD)in the diameter on the measuring plane decreased with the temperature rise in the low temperature section,while the decrease was sharper at the center of the fuel spray cone.(3)The particle size distribution of the spray field measured by the laser particle size analyzer verified the accuracy of the PDPA measurement results to a certain extent.The droplet characteristic diameter and the droplet size distribution coefficient decreased with the increase of the fuel supply pressure difference.
作者
王家俊
桂韬
邱伟
段争梁
梅雨
颜应文
WANG Jiajun;GUI Tao;QIU Wei;DUAN Zhengliang;MEI Yu;YAN Yingwen(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Chengdu 610500,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2020年第8期1643-1654,共12页
Journal of Aerospace Power
基金
国家自然科学基金(51676097)。
关键词
雾化特性
粒径分布
离心喷嘴
燃油温度
激光多普勒
atomization characteristics
particle size distribution
centrifugal nozzle
fuel temperature
laser Doppler
