负直流及低频交流电场对预混火焰影响的实验研究

发布时间：2018-02-06 04:46

本文关键词： 负直流电场低频交流电场频率火焰传播速率燃烧压力　出处：《西安交通大学学报》2016年01期 　论文类型：期刊论文

【摘要】：为了比较直流及低频交流电压的助燃效果,在常温常压下,对定容燃烧弹内的网状电极分别加载负直流和低频交流电压,研究了两种电压对甲烷/空气预混火焰的火焰形状、火焰传播速率和燃烧压力的影响。结果表明:负直流和低频交流电压对平均火焰传播速率和燃烧压力均有一定的促进作用,且低频交流电压的助燃效果要强于负直流电压,随着低频交流电频率的降低,对火焰的促进作用增大。当过量空气系数为1.6时,与未加载电压相比,负直流电场(电压为-5kV)和低频交流电场(频率为40、60、80、100Hz,电压有效值为5kV)作用下的平均火焰传播速率分别提高37.93%、72.41%、55.17%、48.28%和39.66%,相对燃烧压力增大量的最大值分别为0.23、0.65、0.58、0.48和0.28。
[Abstract]:In order to compare the combustion effect of DC and low frequency AC voltages, negative DC and low frequency AC voltages were loaded on the reticular electrodes in constant volume combustion bombs at room temperature and atmospheric pressure. The flame shape of methane / air premixed flame with two kinds of voltages was studied. The results show that negative DC and low frequency AC voltage can promote the average flame propagation rate and combustion pressure to some extent. The combustion effect of low frequency AC voltage is stronger than that of negative DC voltage. With the decrease of low frequency AC frequency, the effect of flame promotion increases. When the excess air coefficient is 1.6, compared with the unloaded voltage. The negative DC field (voltage = -5kV) and the low-frequency AC field (frequency = 400.6080,100Hz). The mean flame propagation rate increased by 37.933.72.41% and 39.66% respectively under the action of 5kV. The maximum values of the relative combustion pressure are 0.230.65, 0.58 and 0.28, respectively.
【作者单位】：西安交通大学能源与动力工程学院;陕西理工学院;南京铁道职业技术学院机车车辆系;
【基金】：国家自然科学基金资助项目(51176150;51476126) 清华大学汽车安全与节能国家重点实验室开放基金资助项目(KF14122)
【分类号】：TK16

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