摘要
针对光滑窄矩形通道内简谐脉动流层流一紊流（Re范围为750～4450）过渡特性进行实验研究。研究发现，脉动流加速阶段，摩阻系数大于稳态摩阻系数，而在减速阶段摩阻系数小于稳态摩阻系数。Womersley数对层流一紊流临界Re有显著影响，在脉动流加速阶段，临界Re随Womersley数的增大而减小，而在脉动减速部分则相反。通过实验拟合出一适用于预测临界转捩点的经验公式，且与稳态有着良好的衔接。
Experimental study of flow characteristic in smooth narrow rectangular channel under harmonic pulsating flow which covers laminar to turbulent flow （Reynolds number 750～4 450） was carried out. The experimental results show that the frictional factors in acceleration phase of pulsating flow are higher than that in steady state, but lower than that in deceleration phase. Womersley parameter has a significant influence on the critical Reynolds number. The critical Reynolds number decreases with the increase of Womersley parameter in acceleration phase and it is opposite indeceleration phase. An empirical correlation Reynolds number based on the experimental critical Reynolds number in steady state. was developed to predict the critical data, and the correlation can fit with
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2013年第9期1539-1543,共5页
Atomic Energy Science and Technology
基金
中央高校基本科研业务费专项资金资助项目(HEUCFZ1008)
核反应堆系统设计技术重点实验室基金资助项目(KZAKA1101)
黑龙江省留学归国基金资助项目(LC2011C18)
