| 涡旋燃烧炉流动、传热和燃烧特性的研究 |
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| 引用本文： | 张健.涡旋燃烧炉流动、传热和燃烧特性的研究[J].工程热物理学报,1995(2). |
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| 作者姓名： | 张健 |
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| 作者单位： | 清华大学工程力学系 |
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| 摘 要： | 本文应用强旋湍流气一固两相流动和煤粉燃烧的数学模型，对新型涡旋燃烧炉内的流动、传热和燃烧过程进行了系统的模拟和分析，得到了与实验相符合的结果。结果表明，涡旋燃烧炉内的湍流空气动力场分布具有强旋、回流和正在发展流的特点。水冷壁总吸热量随燃烧热负荷的增大成比例地增加。煤粉颗粒在炉内的平均停留时间随初始粒径的增大而加长。炉内可实现煤粉的低温、强旋、高效率和高强度燃烧。
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| 关 键 词： | 涡旋燃烧炉，强旋湍流气－固两相流，煤粉燃烧，数值模拟 |
INVESTIGATION OF FLOW, HEAT TRANSFER AND COMBUSTION IN A VORTEX COMBUSTOR |
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| Zhang Jian.INVESTIGATION OF FLOW, HEAT TRANSFER AND COMBUSTION IN A VORTEX COMBUSTOR[J].Journal of Engineering Thermophysics,1995(2). |
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| Authors: | Zhang Jian |
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| Abstract: | A mathematical model for strongly swirling gas-paticle turbulent now and pulverized coal combustion was employed for systematic numerical simulations of the flow, hest transfer,and combustion in a vortex combustor (VC). The calculated results are in generally agree ment with the VC cold flow and combustion test data. The gas turbulent flow in the VC is featured as strongly swirling, recirculating, and developing flow. The total heat remoVal by the water-cooled wall increases proportionally with the firing rate. The mean residence time of the pulverized coal particles increases with their initial diameters. The VC is able to operate at a strong swirl and low temperature combustion environment, with high combustion efficiency and large firing intensity for burning pulverized coal. |
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| Keywords: | vortex combustor strongly swirling gas-particle turbulent flow pulverized coal combustion numerical simulation |
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