西安交通大学能源与动力工程学院,西安,710049
网络首发:2012-07-10,
纸质出版:2012
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周蓉芳, 魏若男, 周竹杰, 等. 点火能量对天然气空气预混合气层流燃烧的影响[J]. 西安交通大学学报, 2012,46(7):21-25.
Effect of Ignition Energy on Laminar Burning of Natural Gas-Air Premixed Mixture[J]. 2012, 46(7): 21-25.
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6 ms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8 mm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2 ms增加到8 ms时
最大压力峰值增加了 3.8%
峰值提前 8.6 ms出现
火焰发展期和快速燃烧期分别缩短了5.2 ms和1.7 ms.
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.
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