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首页> 外文会议>ASME heat transfer conference >EXPERIMENTAL STUDY ON HEAT TRANSFER OF SUPERCRITICAL KEROSENE IN A VERTICAL UPWARD TUBE
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EXPERIMENTAL STUDY ON HEAT TRANSFER OF SUPERCRITICAL KEROSENE IN A VERTICAL UPWARD TUBE

机译：垂直向上管内超临界煤油传热的实验研究

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摘要

A research on the heat transfer performance of kerosene flowing in a vertical upward tube at supercritical pressure is presented. In the experiments, insights are offered on the effects of the factors such as mass flow rate, heat flux and pressure. It is found that increasing the mass flow rate could enhance the heat transfer performances, while increasing the working pressure will deteriorate the heat transfer. Besides, the effect of heat flux on heat transfer is complicated. Based on the analysis of experimental data, enhancement of heat transfer occurs when the inner wall temperature of tube is higher than pseudo-critical temperature while the bulk fluid temperature is lower than the pseudo-critical temperature. At the supercritical conditions, heat transfer is influenced by the significant changes in thermo-physical properties, thus accurate evaluations of the thermo-physical properties become the key for the supercritical heat transfer calculations. The extended corresponding-state principle could be used for evaluating the density and the transport properties of kerosene, including its viscosity and thermal conductivity, at different temperatures and pressures. In order to obtain the numerical values of the heat capacity, a Soave-Redlich-Kwong (SRK) equation of state is used. The correlation for predicting heat transfer in kerosene at supercritical pressure is established, the calculation results from this correlation are in good agreement with the experimental results.
机译：提出了在超临界压力下垂直向上流动的煤油传热性能的研究。在实验中，可以提供有关质量流量，热通量和压力等因素影响的见解。发现增加质量流率可以增强传热性能，而增加工作压力将使传热变差。此外，热通量对热传递的影响是复杂的。基于实验数据的分析，当管的内壁温度高于伪临界温度而散装流体温度低于伪临界温度时，传热增强。在超临界条件下，热物理性质的显着变化会影响传热，因此对热物理性质的准确评估成为超临界传热计算的关键。扩展的对应状态原理可用于评估煤油在不同温度和压力下的密度和传输特性，包括其粘度和导热率。为了获得热容量的数值，使用了Soave-Redlich-Kwong（SRK）状态方程。建立了预测煤油在超临界压力下传热的相关性，该计算结果与实验结果吻合良好。

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