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细微管内氖工质流动冷凝换热特性仿真分析
Authors
何发龙
刘思学
+5 more
刘畅
张红星
杜王芳
苗建印
赵建福
Publication date
15 March 2023
Publisher
Abstract
冷凝换热是两相热控系统中的重要物理过程。细致分析不同作用力影响下流动冷凝过程中的气液行为及其换热性能的影响,对冷凝器优化与设计具有一定指导意义。本文采用三维瞬态VOF模型仿真分析了水平细微管内氖工质管内流动冷凝过程,基于网格无关性分析和实验流型对比,验证了模型的可靠性。分析了质量通量、管径及重力效应对氖工质流动冷凝换热系数及截面气液分布的影响。研究结果表明,质量通量增加、管径减小会提高流动冷凝换热效率,重力效应对冷凝换热效率的影响主要取决于截面气液分布,随着干度变化呈现出重力无关、强化换热和恶化换热三种状态
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Institute Of Mechanics,Chinese Academy of Sciences
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Last time updated on 19/07/2023