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汽车安全与节能学报

汽车安全与节能学报 ›› 2020, Vol. 11 ›› Issue (3): 406-412.DOI: 10.3969/j.issn.1674-8484.2020.03.017

• • 上一篇    

微喷引燃条件下双燃料喷油器针阀的冷却策略

何平 1,2，阮浩达 1 ，梅加化 3 ，王丛洋 1 ，李赵洋 1    

  1. (1.安徽建筑大学 机械与电气工程学院学院，合肥 230601，中国； 2.安徽建筑大学 建筑机械故障诊断与预警技术实验室，合肥 230601，中国； 3.中船动力研究院有限公司 研究开发部，上海 200120，中国 )
  • 收稿日期:2020-06-12 出版日期:2020-09-30 发布日期:2020-10-20
  • 作者简介:第一作者 / First author ： 何平（1980—)，男（汉 )，安徽，副教授。E-mail: peace1823@163.com。
  • 基金资助:
    国家自然科学基金项目（51877001) ；工信部高技术专项（工信部联装函 [2013]412 号 ) ；2020 年度大学生创新 创业训练计划项目（2020112)。

Cooling strategy of a dual fuel injector needle valve under micro pilot ignition condition 

HE Ping1,2, RUAN Haoda1 , MEI Jiahua3 , WANG Congyang1 , LI Zhaoyang1   

  1. (1. School of Mechanical and Electrical Engineering, Anhui Jianzhu University, Hefei 230601, China; 2. Key Laboratory of Construction Machinery Fault Diagnosis and Early Warning Technology, Anhui Jianzhu University, Hefei 230601, China; 3. Department of R & D, China Shipbuilding Power Engineering Institute Co. Ltd, Shanghai 200120, China)  
  • Received:2020-06-12 Online:2020-09-30 Published:2020-10-20

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摘要： 为提高发动机喷油器的耐久性和可靠性，研究了在微喷引燃条件下其针阀的冷却效果。采用 计算流体动力学（CFD) 中的多相流模型与标准湍流模型，在重油和天然气 2 种燃料工作模式下，数 值模拟了针阀的温度场，对不同冷却滑油入口温度下的冷却效果，进行仿真和试验验证。结果是 : 针 阀头部温度是针阀底部温度分布中最高的；针阀冷却效果是：随滑油入口温度的增加,而先增强后减弱； 冷却滑油入口温度为 80 ℃时，两种工作模式下的针阀头部温度均达到最低值，分别为 256.8、361.1 ℃， 针阀冷却效果最优。因而，利用 CFD 数值模拟对双燃料发动机的针阀进行冷却性能研究是可行的。

关键词: 双燃料发动机；微喷引燃；喷油器针阀；冷却滑油；计算流体动力学（CFD) ；数值模拟 

Abstract:  The cooling effect of needle valve was investigated to improve the durability and reliability of an engine injector under micro pilot ignition condition. The temperature fields of an injector needle valve were simulated in a dual fuel mode of heavy oil and natural gas by using a multiphase flow model and a k-ε standard turbulence model in a CFD (computational fluid dynamics). The cooling effects of different inlet temperature of cooling lube were simulated numerically and verified experimentally. The results show that the needle valve head has the highest temperature point at the needle valve bottom. The cooling effect of needle valve enhances at beginning and decreases at following when the inlet temperature of cooling lube increases continuously. The needle valve head reaches its lowest temperature of 256.8 ℃ for heavy oil mode and of 361.1 ℃ for natural gas mode, when the inlet temperature is 80 ℃ , so that having the best cooling effect. Therefore, it is feasible to investigate the cooling performance of the needle valve of dual fuel engine with CFD numerical simulation method. 

Key words: dual fuel engine, micro pilot ignition, injector needle valve, cooling lube, computer fluent dynamic (CFD), numerical simulation 

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