| 变工况下管内两相流与传热特性研究(Ⅰ) |
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| 引用本文： | 杨翔翔,李亮斌.变工况下管内两相流与传热特性研究(Ⅰ)[J].华侨大学学报(自然科学版),1992(3). |
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| 作者姓名： | 杨翔翔 李亮斌 |
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| 作者单位： | 华侨大学化工与生化工程系，华侨大学化工与生化工程系 |
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| 摘 要： | 作为变工况下管内两相流与传热特性研究的实例,本文研究了热力发电厂除氧器滑压运行过程中的动态特性,分析了滑压运行时除氧器需要的安全余量达到最大值所需的时间,推导出最大安全余量的计算公式,计算过程中考虑了下降管中汽液两相流的存在,并以均相流模型计算了下降管中的压降,所得结果不但具有理论意义,而且可供热力工作者在设计和运行时参考。
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| 关 键 词： | 动态特性 滑压运行 安全余量 两相流 |
A Study of Two--Phase Flow and Heat Transfer in a Pipeline under Changing Operating Condition |
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| Yang Xiangxiang,Li Liangbin.A Study of Two--Phase Flow and Heat Transfer in a Pipeline under Changing Operating Condition[J].Journal of Huaqiao University(Natural Science),1992(3). |
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| Authors: | Yang Xiangxiang Li Liangbin |
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| Institution: | Yang Xiangxiang;Li Liangbin Department of Chemistry and Biochemistry |
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| Abstract: | In relation to the two-phase flow and the heat transfer character in a pipeline under chang- ing operating condition, the authors present a case study. The present work covers a study of dynamic performance of a deaerator used in a heat power plant during sliding pressure operation; an analysis of the time required for operating deaerator to reach maximum safety margin; and a formula derived for calculating the maximum safety margin. In calculation,the presence of gas-liquid two-phase in descend- ing pipeline is taken into account,and the pressure drop within it is calculated in the light of a model of homogeneous flow. In addition to theoretical stgnificance, the results may serve as a reference for the engineer of heat engineering. |
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| Keywords: | dynamic performance sliding pressure operation safety margin tow-phase flow |
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