摘要
文章以水为工质,对扁管流道的阻力特性进行了实验研究和理论分析,推导出层流区的阻力系数近似解,并拟合了紊流区的经验关系式。结果表明,扁管流道的摩擦阻力系数变化趋势与普通的圆管流道相同,但在数值上明显高于后者,流态转换区域也较圆管滞后。本文推导出的摩擦阻力系数理论计算式和拟合的经验关系式均有较高的计算精度,计算值与实验值间的相对偏差均在4%以内。
Experimental and theoretical investigations of water flow resistance in flat tube were carried out.The approximate solution of the friction factor was derived theoretically in the laminar region.And the friction factor was also correlated with the experimental data in the turbulent region.The results show that the friction factor of flat tube varies similarly with that of the circular tube,whereas the former is higher than the latter.And also,Reynolds number of transition area from laminar to turbulent region is higher than circular tube.Both the theoretical expression and the empirical correlation are accurate very much,and the deviations are less than 4%.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2011年第3期341-344,共4页
Atomic Energy Science and Technology
关键词
扁管
层流
紊流
摩阻系数
flat tube
laminar flow
turbulent flow
friction factor
