| 圆管内轴向旋转流切向速度湍流强度 |
| |
| 引用本文： | 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, 65(11): 4278-4284. DOI: 10.3969/j.issn.0438-1157.2014.11.009 |
| |
| 作者姓名： | 蔡香丽 李培 杨智勇 黄蕾 魏耀东 |
| |
| 作者单位： | 1. 新疆工程学院化学工程系, 新疆 乌鲁木齐 830091;2. 中国石油大学(北京)化工学院, 北京 102249 |
| |
| 基金项目： | 新疆自然科学基金项目(201233146-1)。@@@@ supported by the Natural Science Foundation of Xinjiang |
| |
| 摘 要： | 采用热线风速仪(hot wire anemometry,HWA)测量了ø300 mm×2000 mm圆管内轴向旋转流瞬时切向速度随时间的变化,重点分析了切向速度湍流强度的分布特点和旋转流摆动对切向速度湍流强度的影响.测量结果表明,瞬时切向速度由高频的湍流脉动速度和低频的波动速度叠加构成.由于受旋转流旋转中心偏离圆管几何中心造成的旋转流摆动的影响,在圆管中心区域瞬时切向速度随时间的波动速度变化较大,边壁区域瞬时切向速度随时间的波动速度变化较小.通过对瞬时切向速度数据进行概率密度分析可知,切向湍流强度不仅受气流脉动的影响,还受旋转流中心摆动的影响,是由自身气流脉动产生的湍流强度和旋转流摆动产生的湍流强度两部分叠加构成.旋转流摆动导致了中心区域的湍流强度远大于边壁面区域的湍流强度.
|
| 关 键 词： | 圆管 旋转流 湍流 湍流强度 |
| 收稿时间： | 2014-04-14 |
| 修稿时间： | 2014-05-29 |
Turbulence intensity of real tangential velocity in circular pipe |
| |
| CAI Xiangli,LI Pei,YANG Zhiyong,HUANG Lei,WEI Yaodong. Turbulence intensity of real tangential velocity in circular pipe[J]. Journal of Chemical Industry and Engineering(China), 2014, 65(11): 4278-4284. DOI: 10.3969/j.issn.0438-1157.2014.11.009 |
| |
| Authors: | CAI Xiangli LI Pei YANG Zhiyong HUANG Lei WEI Yaodong |
| |
| Affiliation: | 1. Department of Chemical Engineering, Xinjiang Institute of Engineering, Urumqi 830091, Xinjiang, China;2. School of Chemical Engineering, China University of Petroleum, Beijing 102249, China |
| |
| 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. |
| |
| Keywords: | circular pipe swirling flow turbulence flow turbulence intensity |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《化工学报》浏览原始摘要信息 |
|
点击此处可从《化工学报》下载免费的PDF全文 |
|
