上海交通大学学报(自然版) ›› 2013, Vol. 47 ›› Issue (03): 341-345.

• 能源与动力工程 • 上一篇    下一篇

斯特林发动机低硫柴油和二甲醚冷态喷雾  

朱光沸1,陈晓玲1,张武高1,顾根香2 ,黄震1   

  1. (1.上海交通大学 动力机械与工程教育部重点实验室, 上海 200240;2. 上海齐耀动力技术有限公司, 上海 201203)  
  • 收稿日期:2012-07-14 出版日期:2013-03-28 发布日期:2013-03-28
  • 基金资助:

    国家自然科学基金资助项目(51176119,50976070)

Simulation Study About the Spray Characteristics of a Stirling Engine by Using Diesel and Dimethyl Ether

ZHU  Guang-Fei-1, CHEN  Xiao-Ling-1, ZHANG  Wu-Gao-1, GU  Gen-Xiang-2 , HUANG  Zhen-1   

  1. (1. Key Laboratory for Power Machinery and Engineering of the Ministry of Education, Shanghai  Jiaotong  University, Shanghai 200240, China; 2. Micropowers Co., Ltd., Shanghai 201203, China)  
  • Received:2012-07-14 Online:2013-03-28 Published:2013-03-28

摘要: 基于斯特林发动机喷雾特性,建立了斯特林喷嘴的数学物理模型,模拟了冷态工况下低硫柴油(ULSD)和二甲醚(DME)2种不同燃料在不同背压下斯特林发动机的喷雾过程,并与实验结果进行了对比分析.研究发现,背压的增大对ULSD的雾化具有促进作用, 对DME的雾化具有抑制作用;相同流量和背压下,DME的贯距比ULSD小,喷雾锥角比ULSD大.当背压增加较大时,继续提高背压对喷雾锥角的影响减弱,且喷雾锥角随着流量的增大而增大.    

关键词: 二甲醚, 斯特林发动机, 冷态, 低硫柴油

Abstract: According to the practical spray characteristics of a Stirling engine, the mathematical and physical model was built and solved. By comparing with experiment data, the model was verified and validated. On this base, the spray characteristic of Stirling engine by using ultralow sulfur diesel (ULSD) fuel and dimethyl ether (DME) under cooling condition were simulated and analyzed. The results show that increasing back pressure can improve the spray characteristics although it could restrain the DME atomization. Compared with ULSD, DME provides shorter tip penetration and wider cone angle under the same mass flow rate and back pressure.With the increase of back pressure, the spray cone angle tends to increase whereas high ambient pressure has slight influence on spray cone angle when the back pressure exceeds a certain high value.  

Key words: Stirling engine, cooling condition, ultralow sulfur diesel (ULSD), dimethyl ether (DME)

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