双燃料发动机放热率计算和试验分析  

Calculation and Experiment on the Heat Release Rate for Dual Fuel Engines

作　　者：汤东[1] 胡正权[1] 刘胜吉[1] 

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013

出　　处：《内燃机工程》2007年第1期6-9,共4页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(50176016);江苏省高技术项目(BG2005024);江苏省教育厅基金项目(04KJD130043)

摘　　要：提出了一个描述双燃料发动机燃烧特性的多区模型,模型将气体燃料的燃烧和引燃柴油的燃烧分别进行考虑。建立了由实测示功图求解双燃料发动机放热率的微分方程式,开发了计算双燃料发动机燃烧放热规律的软件,并在一台生物质气-柴油双燃料发动机上与传统柴油机放热率计算模型进行了试验验证和对比。研究和试验结果表明,用传统柴油机分析方法计算双燃料发动机的放热率峰值偏大,所计算的缸内工质平均温度偏高,新模型计算的结果与实际情况更吻合。A multi-zone heat release model was developed in the present work for prediction of the combustion processes in dual fuel engines and some of their performances. In this model, the combustion of gas fuel and diesel fuel were analyzed separately. Then the differential equations were deduced for calculation of the heat release rate of the combustion processes based on the practical indicator diagram. This new model was applied to a biogas diesel dual fuel engine and compared with the conventional diesel： calculation model, The research results show that the top heat release rate and the temperature calculated by the conventional diesel：model is higher than that calculated by the new model in dual fuel engines. It indicates that the calculating results of new model agree well with the experimental results.

关 键 词：内燃机 双燃料 燃烧 放热规律 生物质气 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]