化工学报Issue(11)：4278-4284,7.DOI:10.3969/j.issn.0438-1157.2014.11.009
圆管内轴向旋转流切向速度湍流强度
Turbulence intensity of real tangential velocity in circular pipe
摘要
Abstract
The real tangential velocity of swirling flow in a circular pipe with diameter 300 mm and length 2000 mm was measured by using hot wire anemometry (HWA), and analysis emphasized on turbulence intensity of the tangential velocity with the effect of oscillation of swirling flow. The real tangential velocity contained high frequency turbulent fluctuation velocity and low frequency fluctuation velocity. The real tangential velocity fluctuated obviously in the center region of the circular pipe, but fluctuated little near the wall of the circular pipe. By analyzing probability density of the real tangential velocity of swirling flow, fluctuation of the real tangential velocity changed greatly along the radial direction. This fluctuation was not only affected by turbulent fluctuation, but also by oscillation of swirling flow. Oscillation of swirling flow resulted in the phenomenon that turbulence intensity of the tangential velocity in the center region was higher than that near the wall.关键词
圆管/旋转流/湍流/湍流强度Key words
circular pipe/swirling flow/turbulence flow/turbulence intensity分类
化学化工引用本文复制引用
蔡香丽,李培,杨智勇,黄蕾,魏耀东..圆管内轴向旋转流切向速度湍流强度[J].化工学报,2014,(11):4278-4284,7.基金项目
新疆自然科学基金项目(201233146-1)。@@@@ supported by the Natural Science Foundation of Xinjiang (201233146-1) （201233146-1）
