叉排玻璃球（20 mm）多孔介质内流态特征的实验研究

摘要

利用叉排20 mm玻璃球床、折射率匹配技术、PIV技术截取流场中心图进行实验。用Tecplot软件得出Re＝4.7至Re＝857.8的流场、流线和等涡量线图。根据流场、流线及等涡量线的密集程度判断：流场在Re＝4.7时，流动缓慢，从Re＝23.3至Re＝128.4，流动强度递增，形成四边形涡波区域， Re＝128.4至Re＝285.9流动逐渐增强；Re＝285.9至Re＝857.8，流动稳定；流线在Re＝4.7至Re＝81.7时，流线流动缓慢递增，在Re＝128.4至Re＝245.1，流线流动逐渐增强，形成海螺状图形，Re＝326.8以后流动稳定；本实验结果对一般流动流态和多孔介质内流态演变研究都有促进作用，为流动区域划分研究起了重要参考作用。%The experiments include staggered 20 mm glass ball are already completed, refractive index matc-hing, PIV interception flow center chart.At Re=4.78 to Re=857, flow field, streamline and equal vortex flow chart were made by Tecplot software.Result of show the flow field in the Re=4.7 flow slowly, at Re=23.3 to Re=128.4, increasing flow, form a quadrilateral graphics, and at Re=128.4 to Re=285.9 flow slow enhance-ment.At Re=285.9 to Re=857.8, flow steady, stream line Re=4.7 to Re=81.7, streamline flow slowly in-creasing, at Re=128.4 to Re=245.1, streamline flow strengthens gradually, form a conch shaped pattern, after Re=326.8 the steady flow.The results of the experiment have an important reference for the research of the evolu-tion of the flow pattern and the porous medium flow regime.