1. 东华大学环境科学与工程学院,上海,201620
2. 西安交通大学动力工程多相流国家重点实验室,西安,710049
网络首发:2019-11-10,
纸质出版:2019
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王会 1, 2, 郭烈锦 2, 等. 梯度渗透率金属泡沫管内的流动与传热特性分析[J]. 西安交通大学学报, 2019,53(11):85-90.
Analysis of Flow and Heat Transfer Characteristics in Metal Foam Filled Tube with Gradient Permeability[J]. 2019, 53(11): 85-90.
王会 1, 2, 郭烈锦 2, 等. 梯度渗透率金属泡沫管内的流动与传热特性分析[J]. 西安交通大学学报, 2019,53(11):85-90. DOI: 10.7652/xjtuxb201911012.
Analysis of Flow and Heat Transfer Characteristics in Metal Foam Filled Tube with Gradient Permeability[J]. 2019, 53(11): 85-90. DOI: 10.7652/xjtuxb201911012.
针对传统采用完全填充的金属泡沫强化管容易引起系统压降大幅增加的问题
对梯度填充这一新型填充方式开展了数值模拟
所研究的换热管径向上填充有两层不同渗透率的金属泡沫。研究获得了梯度渗透率金属泡沫管内的流动与传热特性规律。研究结果显示:梯度填充管的传热和阻力性能与渗透率梯度直接相关; 相比于单一渗透率填充管
当渗透率梯度大于10时
梯度填充管的综合换热性能可以提高2倍; 当渗透率梯度小于0.1时
综合换热性能降低27%。为了达到更好的换热效果
管壁附近金属泡沫的渗透率至少需要是管中心区域的10倍。研究结果可为新型高效、低阻、紧凑式换热器的设计研发提供理论指导。
To solve the problem that the pressure drop of the system is greatly increased by the traditional fully filled metal foam enhanced tube
a new gradient filling method is simulated. The heat exchanger pipe is filled with two layers of metal foam with different permeabilities in the radial direction. Numerical simulation is conducted to study the flow and heat transfer characteristics of the metal foam filled tubes with gradient permeability. The results show that the heat transfer and flow performances are directly related to the permeability gradient. When the dimensionless permeability gradient is greater than 10
the comprehensive heat transfer performance of the metal foam filled tube with gradient permeability can be improved by 2 times compared with that of the pipe with uniform permeability. However
when the dimensionless permeability gradient is less than 0.1
the comprehensive heat transfer performance is decreased by 27%. In order to achieve better heat transfer performance
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