【摘要】 针对斯特林发动机小负荷燃油雾化不良问题，提出了基于鼓泡-引射耦合的雾化方式．基于VOF（Volume of Fluid）仿真研究了鼓泡喷嘴内气液流态，并依据时间线性稳定性分析，对射流液膜失稳和破碎进行数学描述，建立了鼓泡-引射耦合下的初次雾化模型．分析了气液质量比R_GL（gas-liquid mass ratio）、负荷对初次雾化的影响，并与传统雾化方式比较．结果表明：增大R_GL会促进射流失稳、减小液滴粒径．相较于传统雾化方式，鼓泡-引射耦合下小负荷索特平均直径SMD减小约62%，雾化质量显著提高．更多还原

【Abstract】 Aiming at poor atomization under a low load in the Stirling engine,an atomization method based on bubble-ejection coupling was proposed.Based on the VOF（Volume of Fluid）model,the air-liquid flow in the bubbling nozzle was studied numerically.According to temporal stability analysis,the instability and breakup of liquid sheet were mathematically described,and the model of primary atomization under the bubble-ejection coupling was established.The effects of R_GL（gas-liquid mass ratio）and load on primary atomization were analyzed and compared with those by the traditional atomization method.The results showed that increasing R_GL promotes liquid sheet instability and decreases droplet diameter.Compared with the traditional atomization method,SMD（Sauter mean diameter）at bubble-ejection coupling decreases by about 62%,and the atomization quality is significantly improved.更多还原