汽油/氢发动机燃烧特性试验与仿真  

Experiment and Simulation on Combustion Characteristics of a Four Cylinder SI Engine Fueled with Hydrogen and Gasoline

作　　者：闫皓[1] 纪常伟[1] 汪硕峰[1] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100022

出　　处：《农业机械学报》2009年第6期6-9,42,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50522202);北京市自然科学基金资助项目(3082004)

摘　　要：进行了当量比=1的汽油机和当量比分别为0.8、0.6、0.4的纯氢发动机台架试验。通过对测得的汽油机和氢发动机燃烧缸压数据进行标定,建立了较为准确的AVL Boost汽油机和氢发动机燃烧仿真模型,并进行了仿真。结果表明,氢燃料的特性使得缸内混合气的燃烧速度显著加快,燃烧持续期大幅缩短,导致缸压上升,有效热效率得到提高。当量比为0.4的稀薄工况时纯氢发动机仍可正常运行,发动机燃用氢气可改善发动机性能。SI engine experiments were carried out by using hydrogen at equivalent ratio of 0.8, 0.6, and 0.4 and by using gasoline at stoichiometric condition, respectively. Simulation models for gasoline and hydrogen were built based on AVL Boost and calibrated experimentally. The simulation study shows that hydrogen can increase burning rate of hydrogen-air mixture, and shorten combustion duration markedly. As a result, cylinder pressure and thermal efficiency increase accordingly. Hydrogen engine can operate at the equivalence ratio of near 0.4 smoothly and the performance of SI engine is greatly improved.

关 键 词：氢发动机 汽油机 燃烧特性 仿真 试验 

分 类 号：TK463[动力工程及工程热物理—动力机械及工程]