Study of Flame Interference of Counterflow Twin Flames
逆流双火焰火焰干涉研究
基本信息
- 批准号:60460106
- 负责人:
- 金额:$ 2.94万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for General Scientific Research (B)
- 财政年份:1985
- 资助国家:日本
- 起止时间:1985 至 1986
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Concerning the twin flames obtained with a counterflow nozzle burner, the nozzle velocity dependencies of flame temperature, concentration profile, burning velocity, and flame-to-flame distance were investigated for propane/ air mixture, and flame interference effects caused by the existence of two adjacent flames were examined. Furthermore, theoretical analysis was also made on the flammability limits of the twin flames. The obtained results are as follows:1. Some singularities implying the flame strengthening due to flame interference were noticed in the relations of flame temperature and flame distance to the nozzle velocity in a certain velocity range.2. Gas analysis made for the two flames just before and under interference gave no significant differences in the concentration profiles of stable species, which suggests that the active chemical species might play an important role in the flame interference.3. The flammability limits of the twin flames and the one-dimensional-flow flame which is not subjected to interference effects were theoretically compared by the analysis based on a reaction model in which the importance of active species was taken into account, and the limits of the twin flames were found to be more widened owing to the interference.4. The addition effects of hydrogen, well known as an active fuel, to propane was investigated. Though the effect was not so simple, the velocity range of interference was widened (i.e., the interference effect was strengthened ) in the lean side.5. Singularities were noticed also in the relation between the nozzle velocity and the burning velocity obtained by velocity measurements with LDV. However, if the burning velocity is plotted against the velocity gradient normal to the flame surface, the relation becomes monotonous, indicating that the nozzle velocity cannot be regarded as a linear parameter for the flame stretch.
对于丙烷/空气混合物,研究了喷嘴速度对火焰温度、浓度分布、燃烧速度和火焰间距离的影响,并分析了两个相邻火焰的存在对火焰干扰的影响。此外,还对双火焰的可燃极限进行了理论分析。主要研究结果如下:1.在一定的速度范围内,火焰温度和火焰距离与喷嘴速度的关系存在奇异性,表明火焰干扰导致火焰强化.对干扰前和干扰后的两种火焰进行的气体分析表明,稳定组分的浓度分布没有明显差异,这表明活性化学组分可能在火焰干扰中起重要作用.通过考虑活性组分影响的反应模型分析,从理论上比较了双火焰和不受干扰影响的一维流动火焰的可燃极限,发现双火焰的可燃极限因干扰而更宽.研究了活性燃料氢对丙烷的加成作用。虽然效果不是那么简单,但干扰的速度范围被加宽了(即,干扰效应增强).奇异性也注意到喷嘴速度和燃烧速度之间的关系,通过LDV的速度测量获得。然而,如果燃烧速度是针对垂直于火焰表面的速度梯度绘制的,则关系变得单调,这表明喷嘴速度不能被视为火焰拉伸的线性参数。
项目成果
期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
KITANO, Michio: "Flame Interference Effects on Flammability Limits of Counterflow Premixed Flames" Technology Reports, Tohoku Univ.51. 1-17 (1986)
KITANO, Michio:“火焰干扰对逆流预混火焰可燃性极限的影响”技术报告,Tohoku Univ.51。
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- 影响因子:0
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- 通讯作者:
KITANO,Michio: Technology Reports,Tohoku Univ.51. 1-17 (1986)
北野道雄:技术报告,东北大学 51。
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- 影响因子:0
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KITANO Michio其他文献
KITANO Michio的其他文献
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{{ truncateString('KITANO Michio', 18)}}的其他基金
Premixed Combustion of Liquid Fuel by Supply of Air in Micro-bubbles
通过在微气泡中供应空气来预混合燃烧液体燃料
- 批准号:
19560188 - 财政年份:2007
- 资助金额:
$ 2.94万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Premixed Combustion of Low Volatile Liquid Fuel by Air Bubble Blowing
低挥发性液体燃料鼓泡预混燃烧
- 批准号:
10650196 - 财政年份:1998
- 资助金额:
$ 2.94万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Study of Boilover Suppression by Air Bubble Blowing
吹气泡抑制沸腾的研究
- 批准号:
05650189 - 财政年份:1993
- 资助金额:
$ 2.94万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)