| 二维轴对称煤粉气流火炬点火的研究 |
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| 引用本文： | 王志斌,蒋持志,朱皑强,袁友生,徐益谦.二维轴对称煤粉气流火炬点火的研究[J].东南大学学报(自然科学版),1987(3). |
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| 作者姓名： | 王志斌 蒋持志 朱皑强 袁友生 徐益谦 |
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| 作者单位： | 南京工学院热能工程研究所，南京工学院热能工程研究所，南京工学院热能工程研究所，南京工学院热能工程研究所，南京工学院热能工程研究所 |
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| 摘 要： | 本文介绍了二维轴对称煤粉气流火炬点火的试验和理论研究结果。点火源为氧—乙炔火炬。试验煤种为劣质烟煤、贫煤和无烟煤。结果表明,在用火炬引燃煤粉气流时,存在一个对应于最低煤粉浓度的最佳点燃流速,其值随煤粉气流初始温度的升高而增加。文中提出了二维轴对称煤粉气流火炬点火的理论模型,用“直线法”作了数值计算。计算值与试验结果符合较好。利用该模型,还预测了点火源温度、煤粉粒径以及煤中挥发份含量对煤粉气流火炬点火的影响。
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| 关 键 词： | 轴对称 气流 煤粉 氧—乙炔火炬 点火 |
Investigation on Ignition of Two-Dimensional Axisymmetical Pulverized Coal-Air Flow by Flame Torch |
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| Wang Zhibin Jiang Chizhi Zhu Aiqiang Yuan Yousheng Xu Yiqian.Investigation on Ignition of Two-Dimensional Axisymmetical Pulverized Coal-Air Flow by Flame Torch[J].Journal of Southeast University(Natural Science Edition),1987(3). |
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| Authors: | Wang Zhibin Jiang Chizhi Zhu Aiqiang Yuan Yousheng Xu Yiqian |
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| Institution: | Research Institute of Thermoenergy Engineering |
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| Abstract: | The ignition of two-dimensional axisymmetrieal pulverized coal-air flow by oxygen-acetylene torch is investigated both experimentally and theoreti- cally.The low-grade bituminous coal,carbonaceous and anthracite coal are tested.Experimental results show that there is an optimum velocity corrc- sponding to the minimum fuel concentration at ignition and its value increases with the initial temperature of pulverized coal-air flow.An approximate mathematical model is proposed.Straight-line Method is used for the numerical calculation.Theoretical results are in good agreement with the experimental results.By using thing this model,the effects of the temperature of oxygen- acetylene torch,diameter of coal particle and quality of coal on ignition are predicted. |
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| Keywords: | axisymmetrical flow pulverized coal oxygen-acetylene torch ignition |
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