双燃料发动机燃烧放热模型的应用  

Application of combustion heat release model for dual fuel engine

作　　者：汤东[1] 银铭强[1] 来超峰[1] 胡正权[1] 罗福强[1] 

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2008年第1期29-33,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50176016);江苏省高技术项目(BG2005024);内燃机燃烧学国家重点实验室开放基金资助项目(200705);江苏大学高级人才科研基金资助项目(07JDG086)

摘　　要：提出了一个描述双燃料发动机燃烧特性的多区放热模型,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,并在一台生物制气-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为吻合.A multi-zone heat release model is developed for prediction of the combustion processes in dual fuel engines and their performance features. In this model, the combustions of gas fuel and diesel fuel are analyzed separately. The differential equations are deduced for calculation of the heat release rate of the combustion processes based on the practical indicator diagram. This new model is applied to a biogasdiesel dual fuel engine and compared with the conventional diesel calculation model. The result shows that the top heat release rate and the temperature calculated by the conventional diesel analysis method are higher than that calculated by the new model in dual fuel engines. The results calculated by the new model agree well with the experimental results.

关 键 词：发动机 双燃料 燃烧 放热率 生物制气 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程]