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引用次数: 0
摘要
本文介绍了表面温度快速升高时加热器表面瞬态成核沸腾的实验结果。根据频率为每秒 180 000 帧、空间分辨率为每像素 5.5 urn 的高速视频记录结果，现有的成核沸腾过程传热模型的输入数据必须加以完善，以考虑到团状气泡和脉动气泡的存在。已经证实，气泡通过动量、热量和蒸汽质量的交换相互作用，会加速激活相邻的汽化点，因此在蒸汽覆盖加热器表面的初始阶段就会形成气泡群。在成核开始温度以上 0 至 14 K 的壁面过热和 23 至 103 K 的流动过冷条件下，研究了单个气泡、气泡团和脉动气泡的主要特征。
Experimental study of the influence of bubble interaction on their characteristics during transient boiling in a flow of subcooled liquid
The paper presents the experimental results on transient nucleate boiling on the heater surface with rapidly increasing surface temperature. According to the results of high-speed video recording with a frequency of 180 000 frames per second and a spatial resolution of 5.5 urn per pixel, the input data for existing models of heat transfer during nucleate boiling must be refined to take into account the existence of cluster and pulsating bubbles. It has been established that bubbles, interacting through the exchange of momentum, heat and vapor mass, accelerate activation of neighboring vaporization sites, so the clusters of bubbles can form at the initial stage of covering the heater surface with vapor. The main characteristics of single, cluster and pulsating bubbles have been studied for the wall superheating from 0 to 14 K above the temperature of nucleation beginning and flow subcooling from 23 to 103 K.
期刊介绍：
The journal Thermophysics and Aeromechanics publishes original reports, reviews, and discussions on the following topics: hydrogasdynamics, heat and mass transfer, turbulence, means and methods of aero- and thermophysical experiment, physics of low-temperature plasma, and physical and technical problems of energetics. These topics are the prior fields of investigation at the Institute of Thermophysics and the Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences (SB RAS), which are the founders of the journal along with SB RAS. This publication promotes an exchange of information between the researchers of Russia and the international scientific community.
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