摘要
本文采用基元反应模拟H2-O2(N2)混合气体的着火过程,得到了不同散热和不同燃料-氧化剂初始浓度比条件下着火临界曲线。结果表明: H2/O2摩尔比相同时,不同散热条件下的着火临界曲线非常相似,可近似看成同一曲线在第二区的“延伸线”上滑移。临界曲线第二区的P—T关系符合2k1=ks[Ms]。散热对着火极限的影响和着火延迟时间有密切关系,在临界曲线第二区延迟时间最小,导致散热对该区的影响最弱,从而使着火临界曲线非常相似。
Ignition process of H2-O2(N2) mixture in an airtight system are simulated by using detailed chemistry, and ignition limits at different conditions of heat loss and ratio of fuel to oxidation are obtained. At the some molar ratio of H2 to O2, the ignition limits are similar for different heat loss conditions, and they can be considered as a curve slip through the extend second limits. The P-T relation of the second limits can be expressed as 2k1=ks[Ms]. The influence of heat loss on the ignition limits is related to the ignition delay time. On the second limits the ignition delay time is smallest, which weaken the influence of the heat loss and results that the ignition limits are similar.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2005年第4期697-700,共4页
Journal of Engineering Thermophysics
