Optical ct measurement and mathematical prediction of multi-temperature in pulverized coal combustion field
Optical ct measurement and mathematical prediction of multi-temperature in pulverized coal combustion field
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DOI：
10.1016/0017-9310(88)90022-1
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发表时间：
1988-02
影响因子：
5.2
通讯作者：
K. Ohtake;K. Okazaki
中科院分区：
文献类型：
--
作者：
K. Ohtake;K. Okazaki
采用一种新的计算机层析成像（CT）技术测量了煤粉燃烧炉内颗粒和气体的温度分布，其中颗粒温度采用瞬时双色测温法，气体温度采用翼区Na-D线反转法。建立了考虑散射、吸收和辐射传热过程的一维煤粉燃烧场简化数学模型。模型计算预测颗粒温度比气体温度高出400 K以上，特别是在挥发物燃烧区域。这一结果很好地解释了光学测量实际观察到的现象。
Temperature distributions of particles and gas in the pulverized coal combustion furnace were measured by a newly developed CT (computer tomographic) technique in which the particle temperature was measured by an instantaneous two color pyrometry and the gas temperature by a wing zone Na-D line reversal method. A simplified mathematical model was formulated for a one-dimensional pulverized coal combustion field with the radiative heat transfer processes of scattering, absorbing and emitting. The model calculations predicted that the particle temperature was more than 400 K higher than the gas temperature, especially in the region of volatile matter combustion. This result explained the phenomena actually observed by the optical measurements well.