摘要
采用数值模拟与实验相结合的方法,研究了低频振动管外的流动与传热特性,分析了不同参数对换热性能的影响。数值计算结果的场协同理论分析与实验表明:振动有利于强化传热,且其强化传热的效果随着振动频率与振幅升高而增强。在半周期内,时相位为90°时管外的换热性能最好,在一定范围内协同角余弦值随振动频率的变化与振幅基本无关。对比不同管型,沿椭圆管短轴方向振动的协同角余弦值最高,传热效果最好。
Using a method of numerical simulation combined with experiment, the characteristics of flow and heat transfer outside low frequency vibration tubes were studied, and the effect of different parameters on heat transfer performance was analyzed. Theoretical analysis of field synergy on numerical results and experiment show that vibration is favorable to heat transfer enhancement, the effect of which is reinforced with the increase of frequency and amplitude. In a half-period, when time phase is 90°, best heat transfer performance outside tubes is obtained; in a certain range, cosine of field-synergy angle with frequency change is basically independent of amplitude. Comparing different tube types, vibration along the direction of short axis of elliptical tube makes maximum cosine of field-synergy angle and best heat transfer performance.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第5期811-813,共3页
Journal of Engineering Thermophysics
基金
国家重点基础研究发展计划资助项目(No.2007CB206903)
教育部新世纪优秀人才支持计划项目(No.NCET-05-0583)
关键词
强化传热
振动
场协同
椭圆管
heat transfer enhancement
vibration
field synergy
elliptical tube
作者简介
姜波（1982-），男，山东荣成人，博士研究生，主要从事强化传热与节能技术方面的研究。
