雾化槽式喷嘴的试验研究

 一、试验方法 雾化槽式喷嘴实质上就是在逆气流喷射的直流式喷嘴上游加装一个槽形挡板。为简化起见,首先研究单个雾化槽式喷嘴。 试验先后在d=135mm圆形和200mm×100mm矩形试验段中进行。雾化槽与喷油杆均横贯试验段截面（图1）。共试验了24个工况,其参数范围如下:气流速度V_a=56～114m/s;供油压差△P_t=（1.96～14.7）×10⁵Pa;喷嘴孔径d=0.53~0.69mm;喷嘴到雾化槽距离δ=5~15mm;喷嘴下游距离x=55~150mm，四种不同形状和尺寸的雾化槽。

EXPERIMENTAL STUDY ON EMULSIFYING CHANNEL INJECTOR

The experimental study on emulsifying channel injector shows that there is a recirculation zone behind the channel and the downstream turbulent intensity increases considerably （generally ε>10%）. The fuel injected into the channel forms a pair of parallel sources on both outside edges of the channel as two flat slit airblast atomizers. Consequently, its atomizing quality is much better than that of a plain orifice injector. The emulsifying channel injector is worthy of thorough investigation, because its spray diffuses fast and spreads over wide area and its fuel distribution is more uniform and less dependent on its operating conditions.