高密度喷气燃料和常规燃料的油雾场对比试验研究

COMPARATIVE EXPERIMENTAL RESEARCH ON SPRAY FIELDS OF HEAVY AND CONVENTIONAL AVIATION KEROSENE

本文利用脉冲激光全息技术测量了直流喷嘴侧喷下游的高密度喷气燃料和常规喷气燃料的油雾场。获得了各种油滴直径 ,索太尔平均直径及燃油浓度的空间分布规律 ,讨论了气流速度、燃油出口压降对油雾场的影响 ,并对两种燃料的油雾场进行了比较。

Laser holography was used to measure the fuel spray characteristics of heavy jet kerosene and conventional aviation kerosene downstream after a simple orifice injector .The spatial distribution of droplet size and Sauter Mean Diameters (SMD) for two kinds of kerosene have been obtained and compared.In this paper,the effects of air velocity and pressure drop on the fuel spray field are considered.The following conclusions are drawn from the experimental data:1.The magnitude and distribution of droplet size are determined by the air velocity.2.The SMD for the two fuels are,to some extent,related to the fuel pressure.3.The variation of the fuel pressure has less influence on the SMD of the two fuels.4.The empirical formulas are provided for evaluating the effects of the air velocity and the fuel pressure on the SMD.