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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Experimental investigation of phase change in a cavity for varying heat flux and inclination angles
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Experimental investigation of phase change in a cavity for varying heat flux and inclination angles

机译：不同热通量和倾斜角度的腔相变的实验研究

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摘要

In this study, the effect of heat flux and inclination angle variation in a rectangular PCM containing cavity is investigated. In order to investigate of effect of heat flux variation on melting process, the cavity is heated through the bottom plate by 3 levels of heat flux. Also to investigate the effect of inclination angle variation, 3 levels of inclination angle (0 degrees, 45 degrees, 90 degrees) are considered. The changes of the liquid solid boundaries are recorded using Canon G9 camera. 32 thermocouples at 9 heights of the container and 3 thermocouples on heater's plate are implemented by which average temperature of the PCM, liquid fraction, average temperature of the heating surface, the amount of absorbed energy, temperature contour, the phases boundaries deformation, the average temperature at a specific distance of the heater and Nusselt number are analyzed. The results show that, as the heat flux input strengthens, melting time reduces and the rate of heat transfer and heater's temperature increases. The driven Nusselt number implies that as the heat flux increases, the dominant heat transfer mechanism turns to natural convection sooner.
机译：在该研究中，研究了热通量和倾斜角度变化在含有矩形PCM的腔体中的效果。为了调查热通量变化对熔化过程的影响，腔体通过底板加热3水平的热通量。还要研究倾斜角度变化的效果，考虑3级倾角（0度，45度，90度）。使用佳能G9相机记录液体固体边界的变化。 32热电偶在9个容器的容器和加热器板上的热电偶的热电偶实现了PCM的平均温度，液体分数，加热表面的平均温度，吸收能量的量，温度等高，阶段边界变形，平均值分析了加热器和纽带数的特定距离处的温度。结果表明，随着热通量输入增强，熔化时间降低，传热和加热器的温度升高。随着热量通量的增加，驱动的营养号码意味着随着热量通量的增加，优势传热机制越早转变为自然对流。

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