Growth behavior of bubbles containing non-condensable gas in superheated cryogenic liquids

IF 1.8 3区 工程技术 Q3 PHYSICS, APPLIED
Yonghua Huang, Xujin Qin
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引用次数: 0

Abstract

Bubble growth is one of the most critical concerns in flashing or cavitation in metastable superheated liquids. The bubble growth rate and heat and mass transfer rates across the boundary are essential for quantifying the flashing evaporation behavior. Prior simulations treated the bubble as a pure vapor, which dropped an important influencing factor driving bubble growth. A mathematical model is proposed for characterizing bubble growth in superheated cryogenic liquids, namely, liquid oxygen, hydrogen, and nitrogen. The model considers a non-condensable gas component in the bubble, which plays a significant role in the early stages of bubble growth. It not only influences the critical radius of the bubble but also affects the delay time of the growth. The behavior of bubbles in these cryogenic fluids was compared to that in water in terms of radius growth. The effect of the liquid state on the bubble radius was investigated. As expected, the bubble grew faster in the liquid at lower pressures and greater degrees of superheat. Bubbles with smaller critical radii require higher degrees of superheat or thermal disturbances to grow.
含不凝性气体的气泡在过热低温液体中的生长行为
气泡生长是亚稳过热液体中闪蒸或空化的关键问题之一。气泡生长速率和边界传热传质速率是定量分析闪蒸行为的重要参数。先前的模拟将气泡视为纯蒸汽,这降低了驱动气泡生长的重要影响因素。提出了一种描述过热低温液体(即液氧、液氢和液氮)中气泡生长的数学模型。该模型考虑了气泡中不可冷凝气体的成分,它在气泡生长的早期阶段起着重要作用。它不仅影响气泡的临界半径,而且影响气泡生长的延迟时间。在这些低温流体中的气泡行为与在水中的气泡在半径增长方面进行了比较。研究了液相对气泡半径的影响。正如预期的那样,在较低的压力和较高的过热程度下,气泡在液体中增长得更快。临界半径较小的气泡需要较高程度的过热或热扰动才能生长。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Cryogenics
Cryogenics 物理-热力学
CiteScore
3.80
自引率
9.50%
发文量
0
审稿时长
2.1 months
期刊介绍: Cryogenics is the world''s leading journal focusing on all aspects of cryoengineering and cryogenics. Papers published in Cryogenics cover a wide variety of subjects in low temperature engineering and research. Among the areas covered are: - Applications of superconductivity: magnets, electronics, devices - Superconductors and their properties - Properties of materials: metals, alloys, composites, polymers, insulations - New applications of cryogenic technology to processes, devices, machinery - Refrigeration and liquefaction technology - Thermodynamics - Fluid properties and fluid mechanics - Heat transfer - Thermometry and measurement science - Cryogenics in medicine - Cryoelectronics
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