原子能科学技术2013，Vol.47Issue(1)：43-47,5.DOI:10.7538/yzk.2013.47.01.0043
高宽比对矩形窄通道内单相水流动特性的影响机理
Mechanism of Effect of Aspect Ratios on Single-Phase Water Flow Behaviors in Narrow Rectangular Ducts
摘要
Abstract
Single-phase water flow behaviors in narrow rectangular ducts were studied theoretically and experimentally. The results show that aspect ratios have significant influence on flow resistance. The frictional resistance in rectangular duct increases as the aspect ratio decreases both in laminar flow region and the smooth region of turbulent flow. The visual observation shows that critical Reynolds number for narrow rectangular ducts ranges from 2 500 to 2 600, and the aspect ratio nearly has insignificant influence on flow regime transition. The single-phase flow resistance is influenced significantly by wetting perimeter and velocity distribution, which vary with the aspect ratio in laminar flow. For turbulent flow, the turbulent mean velocity in viscous sub-layer and wetting parameter become important parameters affecting the flow resistance.关键词
矩形窄通道/高宽比/摩擦阻力/湿周/速度分布Key words
narrow rectangular duct/ aspect rati/ frictional resistance/ wetting perimeter/ velocity distribution分类
能源科技引用本文复制引用
幸奠川,阎昌琪,曹夏昕,刘传成,孙波..高宽比对矩形窄通道内单相水流动特性的影响机理[J].原子能科学技术,2013,47(1):43-47,5.基金项目
国家自然科学基金资助项目(11175050) （11175050）
高等学校博士点专项科研基金资助项目(20092304110020) （20092304110020）
