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首页> 外文期刊>Journal of visualization >High-speed visualization and image processing of subatmospheric water boiling on a transparent heater
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High-speed visualization and image processing of subatmospheric water boiling on a transparent heater

机译：透明加热器上沸腾水沸水的高速可视化和图像处理

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The paper is devoted to the processing and analysis of the high-speed visualization data on water pool boiling in the pressure range of 5.5-103 kPa. The study of the vapor bubbles dynamics and evolution of void fraction near a heated wall during boiling was performed using a special design of a transparent heating element and high-speed visualization from its bottom side. To analyze the wide array of video data, automatic image processing programs were developed. As a result, a detailed statistical analysis of the growth curves and departure diameters of vapor bubbles during boiling at different pressures was carried out. It was shown that at ultra-low pressure 5.5 kPa after the departure of massive vapor bubbles the pulsating boiling regime was occurred. A method based on the estimation of void fraction near a heated wall was proposed and implemented for the description of this cyclic boiling regime at low sub-atmospheric pressure.
机译：本文致力于在5.5-103kPa的压力范围内的水池上的高速可视化数据的加工和分析。使用透明加热元件的特殊设计和从其底侧的高速可视化进行沸腾期间加热壁附近的蒸汽气泡动态和空隙率的演化。为了分析各种视频数据，开发了自动图像处理程序。结果，进行了在不同压力下沸腾期间蒸汽气泡的生长曲线和脱离直径的详细统计分析。结果表明，在大规模蒸汽气泡之后，在超低压力5.5kPa处发生脉动沸腾状态。提出了一种基于加热壁附近的空隙率估计的方法，并实施了在低亚大气压下的这种环状沸腾状态的描述。

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