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A simplified method for heat transfer prediction of supercritical fluids in circular tubes

机译：圆管中超临界流体传热的简化预测方法

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摘要

This paper presents a new method for heat transfer prediction in supercritical fluids. Emphasis is put on the simplicity of the correlation structure, its explicit coupling with physical phenomena and the selection criteria of the test data. Assessment of qualitative behaviour of heat transfer is carried out based on existing test data and the experience gathered in the open literature. A single dimensionless number, the acceleration number, is introduced to correct the deviation of heat transfer of supercritical fluids from that of conventional fluids. The new correlation structure excludes any direct dependence of the heat transfer coefficient on the wall surface temperature, and eliminates possible numerical instability. The uncertainty analysis of the test data provides information about the sources and the levels of uncertainties of various parameters, and is strongly required for the selection of both the dimensionless parameters implemented into the heat transfer correlation and the test data for the derivation of correlations. Detailed assessment shows that the new correlation gives reasonable prediction accuracy over a wide parameter range and is also capable of predicting heat transfer behaviour in the heat transfer deterioration region.
机译：本文提出了一种新的超临界流体传热预测方法。重点放在相关结构的简单性，与物理现象的显式耦合以及测试数据的选择标准上。基于现有的测试数据和公开文献中收集的经验，对传热的定性行为进行了评估。引入一个唯一的无量纲数，即加速度数，以校正超临界流体与传统流体的传热偏差。新的相关结构排除了传热系数对壁表面温度的任何直接依赖，并消除了可能的数值不稳定。测试数据的不确定性分析提供了有关各种参数不确定性的来源和水平的信息，并且对于选择实现到热传递相关性中的无量纲参数以及用于推导相关性的测试数据都是非常需要的。详细的评估表明，新的相关性可以在较宽的参数范围内提供合理的预测精度，并且还能够预测传热恶化区域的传热行为。

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  • 来源
    《Annals of nuclear energy》 |2009年第8期|1120-1128|共9页
  • 作者

    X. Cheng; Y.H. Yang; S.F. Huang;

  • 作者单位

    School of Nuclear Science and Engineering, Shanghai jiao Tong University, Dongchuan Road 800, Shanghai 200240, China;

    School of Nuclear Science and Engineering, Shanghai jiao Tong University, Dongchuan Road 800, Shanghai 200240, China;

    School of Nuclear Science and Engineering, Shanghai jiao Tong University, Dongchuan Road 800, Shanghai 200240, China;

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