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中国电机工程学报 2008, 28(2) 39-42 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 工程热物理 |
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基于科艾定律的燃烧指标的实验研究 |
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周英彪 范杜平 段权鹏 傅培舫 |
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煤燃烧国家重点实验室(华中科技大学) 煤燃烧国家重点实验室(华中科技大学) 煤燃烧国家重点实验室(华中科技大学) 煤燃烧国家重点实验室(华中科技大学) |
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摘要：
运用基于科艾(Kooij)定律而非Arrhenius定律的燃烧特征方程和一种特殊因子(温度平方与升温速率之比乘以燃烧加速度与燃烧速率之比)研究不同升温速率和颗粒尺寸实验条件下的燃烧特性。使用德国的NETZSCH STA 409C热重分析仪进行2组实验--5种不同升温速率(10, 20, 30, 40 及 50 K×min-1)和5种不同的颗粒尺寸(<72, 72~100 100~120, 120~180及180~225 mm)。实验表明了随着升温速率的增加，温度延迟增加，灰分含量减少，燃尽温度增加；随着颗粒尺寸的减小，挥发分开始析出并燃烧的温度降低，燃烧峰值提高，燃烧峰宽变窄，灰分含量增加。 |
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关键词：
燃烧特征方程
热重分析
燃烧指标
升温速率
颗粒尺寸
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Experimental Study of Combustion Characteristic Index Based on the Kooij Law |
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Abstract:
The combustion characteristic with different heating rates and particle sizes was studied using a new combustion characteristic equation based on the Kooij law instead of the Arrhenius law and a special factor (the ratio between temperature square and the heating rate multiplying the ratio between the combustion acceleration and the combustion rate) were developed. Using a NETZSCH STA 409C thermo-balance, three groups of experiments were designed: five different heating rates (10, 20, 30, 40 and 50 K′ min-1) and five different particle sizes (<72, 72-100 100-120, 120-180 and 180-225 μm). The experimental results indicate that with the heating rate increasing, the temperature delay increases, the ash content decreases and the burnout temperature increases; with the particle size decreasing, the ignite temperature of the volatile decreases, the combustion peak value increases, the peak width of combustion narrowed and the ash content increases. |
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Keywords:
combustion characteristic equation
thermal resistance
combustion index
production simulation
particle size
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收稿日期 2007-03-20 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 周英彪 |
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作者简介: |
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作者Email: tiankong2100@gmail.com;ybzh@263.net |
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| Copyright by 中国电机工程学报 |
