高Pr数流体在三维内肋管中临界雷诺数研究  

Investigation on Critical Reynolds Number of High Prandtl Number Fluid within Three-dimensional Internally Crossing-finned Tube

作　　者：张川[1,2] 付静[3] 廖光亚[2] 

机构地区：[1]华北水利水电学院,河南郑州450011 [2]重庆大学,重庆400030 [3]河南机电高等专科学校,河南新乡453003

出　　处：《华北水利水电学院学报》2011年第6期14-16,共3页North China Institute of Water Conservancy and Hydroelectric Power

基　　金：国家自然科学基金项目(50906102);河南省教育厅自然科学研究计划项目(2011A470007);华北水利水电学院高层次人才科研启动基金(201028)

摘　　要：采用正交试验设计方法,以未使用过的润滑油为工质,对高Pr数流体在肋叉排列三维内肋管中的流动特性进行了试验研究.结果表明:采用肋叉排列的三维内肋管可使高Pr数流体在较低的雷诺数下实现从层流向湍流的转变,其临界雷诺数Recr范围为100～200.在工程应用中,采用三维内肋管进行高黏度流体换热,容易使流动处于换热系数较高的湍流区获得明显的强化换热效果.用最小二乘法对试验数据进行多元线性回归,得到了肋叉排列的三维内肋管肋形结构对流态转变的临界雷诺数的准则方程式,为后续的分区强化传热提供参考.The performance of flow resistance of high Prandtl number fluid within three-dimensional internally crossing-finned tube was investigated with orthogonal experimental method.Fresh oil was selected as work medium in this study.Results showed that obvious low critical Reynolds numbers at the range of 100 to 200 were attained within all experimental tubes,which indicated 3-D internally crossing-finned tubes could accelerate the transform from laminar flow to turbulent flow.The empirical equation on critical Reynolds number within 3-D internally crossing-finned tubes was obtained using linear minimal dual multiply method.The optimal configurations of 3-D internally crossing-finned tube for the flow transition were also discussed according to experimental results.This study offered the reference for the later study on heat transfer of 3-D internally crossing-finned tubes.

关 键 词：三维内肋管 高Pr数流体 正交试验设计 临界雷诺数 强化传热 

分 类 号：O35[理学—流体力学]