【作者】 黄昕； 蒋皓波； 朱登豪； 邓俊； 李理光；

【Author】 HUANG Xin;JIANG Haobo;ZHU Denghao;DENG Jun;LI Liguang;School of Automotive Studies,Tongji University;CDHK,Tongji University;

【机构】 同济大学汽车学院； 同济大学中德工程学院；

【摘要】 甲烷是一种理想的低碳代用燃料,但其在空气中燃烧缓慢,为改善这一缺陷,可采用甲烷氩气循环发动机的新概念。作为其理论研究基础,本文对比了甲烷在空气中和在氩氧混合气中燃烧的差异。发现层流火焰速度峰值从初始压力P₀=0.1MPa时空气的接近40cm/s增加到氩气的超过70cm/s,P₀=0.3MPa时则从25cm/s增加到超过55cm/s;燃烧压力峰值也从初压0.3MPa时空气的1.44MPa提高到氩氧混合气的2.18MPa。此外,燃烧稀限也有所拓宽,但火焰稳定性有所降低。更多还原

【Abstract】 Methane is an ideal alternate fuel,but the burning velocity is very slow in the air.In order to improve this,the new concept of methane/argon power cycle engine can be applied.As the theoretical base of this engine,the differences between air and argon/oxygen were researched.It was found that the peak laminar flame speed of P₀=0.1 MPa in air is nearly 40 cm/s,while in argon it is over 70 cm/s.For P₀ =0.3 MPa,it is from 25 cm/s to 55 cm/s.The peak combustion pressure in P₀=0.3 MPa also rises from 1.44 MPa to2.18 MPa.Besides,the lean burn limit was also broadened but flame stability reduced.更多还原