柴油丙烷混合燃料的喷雾特性的试验研究

利用高速摄像和纹影成像系统研究了柴油溶解丙烷混合燃料喷雾特性。研究了不同比例柴油/丙烷混合燃料的喷雾发展过程,归纳出柴油溶解不同比例丙烷在不同环境背压下喷雾的喷射距离、破碎长度、喷雾锥角随时间的发展规律。研究结果表明:柴油溶解不同比例丙烷混合燃料与纯柴油的喷雾特性在形态上存在较明显的差别,但是在喷射距离、破碎长度和喷雾锥角与时间及背压的关系上规律相同,即喷射距离与时间呈指数关系,破碎长度与时间呈负指数关系。喷雾锥角随背压及柴油中溶解的丙烷含量的增加而增大。

Experimental Study on Spray Characteristics of Diesel Oil Containing Dissolved Propane

An experimental study was carried out by using high-speed photograph and schlieren method to investigate the spray characteristics of diesel oil containing dissolved propane.The spray developing processes of the blends with various propane fractions were investigated.Spray tip penetration,breakup length and spray cone angle of diesel oil containing dissolved propane versus time under different backpressures were obtained.The results show that the spray patterns of the diesel containing dissolved propane give different from that of diesel oil spray.However,the trends in spray tip penetration,breakup length and spray cone angle of diesel oil containing dissolved propane spray versus time and back pressure are similar to that of diesel oil spray: the variation of the spray tip penetration with time appears as an exponential relation,and the variation of breakup length appears as a negative exponential relation.The spray cone angle not only increases with the increase of propane fractions,but also increases with the increase of backpressure as well.