摘要
为了揭示压力对直射式喷嘴雾化影响的雾化机理,针对D=0.2 mm、D=0.3 mm的直射式喷嘴采用实验和数值模拟研究。主要获得以下结论:压力是影响直射式喷嘴雾化的重要因素。压力越大,燃油液滴粒径SMD越小、喷雾锥角越大。直射式喷嘴的压力增大,雾化效果增强趋势逐渐降低;压力增大对一次雾化影响较大,对二次雾化影响较小。使用TAB模型的数值模拟结果能很好的预测出与实验一致的直射式喷嘴雾化特性,可应用于工程设计。
In order to reveal the effects of pressure on the atomization mechanism of plain orifice atomizer,we carried out experiments and numerical simulations on plain orifice atomizers with diameters of 0.2 mm and 0.3 mm.The results showed that pressure was the major factor influencing the atomization performance of the plain orifice atomizer.The higher the pressure,the smaller the sauter mean diameter(SMD)and the bigger the spray angle.With the increase of pressure,its enhancing effect on the atomization performance decreased;the influence of increasing pressure on the first atomization was more significant than that on the second atomization.The numerical simulation results obtained by using Taylor Analogy Breakup(TAB)model was in accordance with the experiment results,which could be used in engineering design.
作者
吴进军
常国强
钱鑫
WU Jinjun;CHANG Guoqiang;QIAN xin
出处
《现代机械》
2019年第6期46-49,共4页
Modern Machinery
