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气隙式膜蒸馏中空气隙内流动与换热研究
引用本文:高虹,田瑞,杨晓宏,李嵩. 气隙式膜蒸馏中空气隙内流动与换热研究[J]. 工程热物理学报, 2009, 30(12)
作者姓名:高虹  田瑞  杨晓宏  李嵩
作者单位:1. 内蒙古工业大学能源与动力工程学院,内蒙古,呼和浩特,010051
2. 清华大学工程力学系,北京,100084
基金项目:国家自然科学基金,内蒙古自治区自然科学基金 
摘    要:本文针对膜蒸馏实验中开放式的窄空气隙,研究其内流动与换热机理.研究发现,对于开放式的大宽隙比(120:1)空气隙,即使其厚度仅为 1 mm,也会形成向上流动的流场,其流动状态为层流,温度分布为直线分布.空气隙内按实验结果求得的热流密度大于按导热公式计算的结果.本文给出的数值模拟结果与实验结果吻合较好.

关 键 词:膜蒸馏  空气隙  自然对流  数值模拟

FLOW AND HEAT TRANSFER IN AN AIR GAP OF A MEMBRANE DISTILLATION SYSTEM
GAO Hong,TIAN Rui,YANG Xiao-Hong,LI Song. FLOW AND HEAT TRANSFER IN AN AIR GAP OF A MEMBRANE DISTILLATION SYSTEM[J]. Journal of Engineering Thermophysics, 2009, 30(12)
Authors:GAO Hong  TIAN Rui  YANG Xiao-Hong  LI Song
Affiliation:GAO Hong~1 TIAN Rui~1 YANG Xiao-Hong~1 LI Song~2 (1.College of Energy and Power Engineering,Inner Mongolia University of Technology,Huhhot 010051,China,2.Department of Engineering Mechanics,School of Aerospace,Tsinghua University,Beijing 100084,China)
Abstract:The mechanism of flow and heat transfer in an air gap in air gap membrane distillation (AGMD) is studied in this paper.The heat transfer method in the air gap cannot be considered as heat conductive even the air gap width is only 1 millimeter because the up flow will be appear in the air gap.The flow is laminar natural convective flow and temperature distribution is linear.The experimental heat flux of the air gap is larger than the result calculated from conductive formula. The result of numerical simulati...
Keywords:membrane distillation  air gap  natural convection  numerical simulation
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