Transient and Steady Spray Characteristics of Soybean Oil/2,5-Dimethylfuran Blended Fuel in an Underwater Stirling Engine  

作　　者：王继刚 乔信起 周枫 王林涛 WANG Jigang;QIAO Xinqi;ZHOU Feng;WANG Lintao(School of Mechanical Engineering,Yangzhou University,Yangzhou 225127,Jiangsu,China;Key Laboratory of Power Machinery and Engineering of Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China;School of Energy and Power Engineering,Wuhan University of Technology,Wuhan 430063,China;Zhejiang Marine Development Research Institute,Zhoushan 316021,Zhejiang,China;Shanghai Marine Diesel Engine Research Institute,Shanghai 201108,China)

机构地区：[1]School of Mechanical Engineering,Yangzhou University,Yangzhou 225127,Jiangsu,China [2]Key Laboratory of Power Machinery and Engineering of Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China [3]School of Energy and Power Engineering,Wuhan University of Technology,Wuhan 430063,China [4]Zhejiang Marine Development Research Institute,Zhoushan 316021,Zhejiang,China [5]Shanghai Marine Diesel Engine Research Institute,Shanghai 201108,China

出　　处：《Journal of Shanghai Jiaotong university(Science)》2024年第2期216-229,共14页上海交通大学学报（英文版）

基　　金：the Natural Science Foundation of Jiangsu Province(No.BK20220588);the Initial Scientific Research Fund of Yangzhou University(No.137012553);and the Public Welfare Technology Research Program of Zhejiang Province(Nos.LGG19E060001 and LGG 21E090001)。

摘　　要：The reduction of oxygen consumption is a key factor to improve the energy density of underwater Stirling engine.A series of fundamental experiments are carried out to elucidate the spray characteristics of soybean oil/2,5-dimethylfuran(DMF)blended fuel in an underwater Stirling engine.Spray characteristics such as spray penetration,spray angle,spray area,and light intensity level under low injection and ambient pressures are obtained using image post-processing method.The results show that the effects of injection pressure,ambient pressure,and nozzle diameter on the transient spray characteristics of underwater Stirling engine are similar to those of diesel engine.However,in the steady spray process,the injection pressure has little effect on spray near angle,and the spray far angle increases with the increase of the injection pressure.Compared with the spray far angle at injection pressure of 3 MPa,the spray far angle at 5 MPa and 7 MPa increased by 11.38%and 18.14%respectively.The addition of DMF can obviously improve the atomization of soybean oil/DMF blended fuel.The spray angle of blended fuel in transient process increases with the increase of the DMF concentration.The spray near angle has exceeded that of diesel(46.21°)when the DMF volume fraction exceeds 25%.The spray far angle is equivalent to that of diesel when the DMF volume fraction reaches 75%.Moreover,the spray with gas ejection no longer keeps conical,the droplet diameter distribution is more dispersed,and the droplet diameter is smaller.

关 键 词：spray angle steady spray soybean oil 2 5-dimethylfuran(DMF) Stirling engine 

分 类 号：U664.124[交通运输工程—船舶及航道工程]