闪急沸腾喷雾速度场的LDA研究(英文)  

Study on the Velocity Field of Flash Boiling Spray by LDA

作　　者：乔信起[1] 刘建江[1] 黄震[1] 陈红岩[2] 

机构地区：[1]上海交通大学动力与能源工程学院,上海200030 [2]蚌埠汽车管理学院,蚌埠233011

出　　处：《燃烧科学与技术》2001年第4期303-308,共6页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目 (597760 2 0 );天津大学内燃机燃烧学国家重点试验室科学基金资助项目(1 999);上海市博士后基金资助项目 (H992 30 0 8)

摘　　要：为探索代用燃料液化石油气 L PG和二甲醚 DME的喷雾机理 ,采用 L DA技术测量了喷雾粒子的速度分布。为安全起见 ,用制冷剂 R12作试验液体 ,它与 L PG和 DME有相似的物理特性。为做比较 ,在相同试验条件下对传统柴油喷雾进行了测量。考察了喷雾模式对速度分布的影响。结果表明 ,R12喷雾的速度分布比传统柴油喷雾均匀得多 ,前者的平均径向速度远大于后者。In order to gain an addtional insight into the flash-boiling spray characteristics of alternative fuels,LPG and DME,an experimental study was carried out to investigate drop velocity distribution in the spray using LDA technique.In this work,for safety,a refrigerant (freon R12) was used as test liquid,which has very similar physical properties to those of DME and LPG.In order to make comparison,the conventional spray of diesel fuel was also measured under the same experimental conditions.The effect of spray pattern on velocity distribution was exmained.The results show that R12 spray will produce more uniform velocity distribution than conventional diesel fuel spray.The radial velocity of R12 liquid is much larger than that of diesel fuel.It is believed to be attributed to greatly enhanced atomization and liquid-gas mixing resulting from flash-boiling phenomenon.

关 键 词：闪急沸腾 喷雾特性 速度场 代用燃料 LDA 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]