| 过热器/再热器管道壁面温度的预测 |
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| 引用本文： | 徐鸿,赵志渊,林振娴.过热器/再热器管道壁面温度的预测[J].中南大学学报(自然科学版),2011(9). |
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| 作者姓名： | 徐鸿 赵志渊 林振娴 |
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| 作者单位： | 华北电力大学能源动力与机械工程学院; |
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| 基金项目： | 中央高校基本科研业务费专项资金资助项目(09QX61); 北京市教育委员会共建项目(X90017) |
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| 摘 要： | 为了得到过热器/再热器管壁温度分布特性,通过对过热器/再热器管道的传热过程进行研究,并与经验公式相结合建立具有氧化膜的炉管传热的物理模型。分析在不同的管道几何尺寸、烟气温度、蒸汽流量和温度的情况下,管道外壁温度、氧化层/基体界面温度和氧化层/蒸汽界面温度的变化过程,最后定量地解释管道外壁温度、氧化膜/基体温度随运行时间增长而升高的原因,得到了它们的温升系数Aw和An与氧化层引起的温升系数B之间的关系为:B=α1Aw+α2An(其中,α1和α2分别为管外壁、氧化层/基体界面对氧化膜增长的敏感程度)。
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| 关 键 词： | 氧化膜 温度 传热 预测 |
Prediction of wall temperature diversification of superheater and reheater tubes |
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| XU Hong,ZHAO Zhi-yuan,LIN Zhen-xian.Prediction of wall temperature diversification of superheater and reheater tubes[J].Journal of Central South University:Science and Technology,2011(9). |
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| Authors: | XU Hong ZHAO Zhi-yuan LIN Zhen-xian |
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| Institution: | XU Hong,ZHAO Zhi-yuan,LIN Zhen-xian (School of Energy,Power & Mechanical Engineering,North China Electric University,Beijing 102206,China) |
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| Abstract: | In order to get the wall temperature distribution characteristics of superheater/reheater tubes,a heat-transfer physical model of tubes with the oxide film was established by studying the heat transfer process of superheater/reheater tubes and the empirical formula.The temperature changing processes of tube outer-wall,the oxide scale/substrate interface and the oxide scale/steam interface were analyzed at different tube geometries,gas temperatures,steam flows,pressures and temperatures.Finally,the reason wh... |
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| Keywords: | oxide scale temperature heat transfer prediction |
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