| 气相温度脉动对生物质颗粒内温度变化的作用 |
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| 引用本文： | 张 健,庞 杰. 气相温度脉动对生物质颗粒内温度变化的作用[J]. 热能动力工程, 2019, 34(10): 167 |
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| 作者姓名： | 张 健 庞 杰 |
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| 作者单位： | 清华大学 工程力学系，北京 100084,清华大学 工程力学系，北京 100084 |
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| 基金项目： | 国家自然科学基金（51376106） |
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| 摘 要： | 作为研究湍流与生物质颗粒反应之间相互作用的基础，对置于有温度脉动热气流中的生物质颗粒内瞬时温度随时间的变化进行了计算。结果表明，气相温度脉动导致颗粒表面与中心瞬时温度均出现了脉动，而颗粒表面比中心瞬时温度的脉动幅度要大；随气相温度脉动强度和生物质颗粒Re的增大，颗粒表面与中心瞬时温度的脉动幅度均增大。
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| 关 键 词： | 生物质颗粒；气相温度脉动；颗粒内瞬时温度 |
Effects of Gas Temperature Fluctuation on the Temperature Variations Inside Biomass Particle |
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| ZHANG Jian and PANG Jie. Effects of Gas Temperature Fluctuation on the Temperature Variations Inside Biomass Particle[J]. Journal of Engineering for Thermal Energy and Power, 2019, 34(10): 167 |
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| Authors: | ZHANG Jian and PANG Jie |
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| Affiliation: | Department of Engineering Mechanics,Tsinghua University,Beijing,China,Post Code: 100084 and Department of Engineering Mechanics,Tsinghua University,Beijing,China,Post Code: 100084 |
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| Abstract: | As a basis to explore the interactions between turbulence and biomass particle reactions,the instantaneous temperature variations inside a biomass particle are calculated in the present paper.The particle is suspended in a hot gas with fluctuating temperature.The results show that the gas temperature fluctuation leads to the temperature fluctuations at the particle surface and center.The fluctuation amplitude of the instantaneous temperature at the particle surface is larger than that at the particle center.Both of them increase with the fluctuation intensity of the gas temperature and the particle Reynolds number. |
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| Keywords: | biomass particle gas temperature fluctuation instantaneous temperature inside particle |
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