Supplemental High-Speed Videos for: Experimental comparison and visualization of in-tube continuous and pulsating flow boiling

These videos show pulsating flow boiling performed by a pulse width modulated expansion valve and continuous flow boiling performed by a stepper motor expansion valve. The cycle time for the pulsating flow are 1 s and 5 s, respectively. The refrigerant is R134a with upstream saturation temperature of 30 C and subcooling of 2 K and 20 K, respectively. Downsteam evaporation temperature is 5 C. The time-averaged mass flux is 100 kg/m2s. More information is available in recent submitted paper.

本数据集展示的视频包含两类实验：由脉宽调制膨胀阀（pulse width modulated expansion valve）实现的脉动流动沸腾（pulsating flow boiling），以及由步进电机膨胀阀（stepper motor expansion valve）实现的连续流动沸腾（continuous flow boiling）。该脉动流动的循环周期分别为1秒与5秒。实验所用制冷剂为R134a，其上游饱和温度为30 ℃，过冷度（subcooling）分别为2 K与20 K；下游蒸发温度为5 ℃。时间平均质量通量（time-averaged mass flux）为100 kg/(m²·s)。更多详细信息可参阅近期已投稿的学术论文。