摘要
通过改变点火线圈的充电时间,研究了充电时间与天然气空气预混合气点火能量、预混层流燃烧速度及压力和放热率等燃烧特性参数之间的关系.结果表明:点火能量随充电时间的增加而增大,当充电时间增加到6ms时,点火能量的增加趋势减缓;点火能量能会影响火核的形成和初期火焰的发展,当火核半径发展到8mm时,火焰传播速度不受影响;压力峰值随点火能量的增加逐渐增大且峰值位置提前,当充电时间由2ms增加到8ms时,最大压力峰值增加了3.8%,峰值提前8.6ms出现,火焰发展期和快速燃烧期分别缩短了5.2ms和1.7ms.
The relations of charging time with ignition energy, premixed laminar burning velocity, and combustion characteristics, such as pressure and heat release rate, of the natural gas-air premixed mixture were studied by changing the ignition coil charging time. The results show that the ignition energy increases almost linearly with the increase in the coil charging time. The ignition energy increases slowly when the charging time increases to 6 ms. The flame initiation and the early development are accelerated because of the increase in ignition energy but ignition energy has no effect on the flame propagation speed after the nuclear radius increases to 8 mm. The peak combustion pressure increases and occurs earlier when charging time increases. When the charging time rises from 2 ms to 8 ms, the maximum peak pressure increases by 3.8% and occurs 8. 6 ms in advance, and the flame development period and the rapid combustion period decrease by 5.2 ms and 1.7 ms, respectively.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2012年第7期21-25,共5页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目(51176150)
美国通用GM公司项目
关键词
点火能量
燃烧
火焰传播速度
容弹
ignition energy
combustion
flame propagation speed
constant volume bomb
