北京航空航天大学学报 ›› 2018, Vol. 44 ›› Issue (8): 1577-1586.doi: 10.13700/j.bh.1001-5965.2017.0614

• 论文 • 上一篇    下一篇

同轴旋转圆台环隙流动机制及实验研究

鲍锋1, 曾华轮1, 邹赫1, 刘锦生2, 刘志荣1, 朱睿1   

  1. 1. 厦门大学 航空航天学院, 厦门 361005;
    2. 清华大学 航空航天学院, 北京 100084
  • 收稿日期:2017-10-09 修回日期:2018-01-08 出版日期:2018-08-20 发布日期:2018-08-29
  • 通讯作者: 朱睿 E-mail:zhurui@xmu.edu.cn
  • 作者简介:鲍锋,男,博士,教授。主要研究方向:飞机尾流控制、流体实验设备设计、车辆船舶减阻、分离控制;朱睿,男,博士,助理教授。主要研究方向:实验流体力学、流动控制、民航安全。
  • 基金资助:
    国家自然科学基金(11072206);福建省自然科学基金(2012J01023)

Mechanism and experimental research on fluid flow in annulus of coaxial rotating conical cylinders

BAO Feng1, ZENG Hualun1, ZOU He1, LIU Jinsheng2, LIU Zhirong1, ZHU Rui1   

  1. 1. School of Aerospace Engineering, Xiamen University, Xiamen 361005, China;
    2. School of Aerospace Engineering, Tsinghua University, Beijing 100084, China
  • Received:2017-10-09 Revised:2018-01-08 Online:2018-08-20 Published:2018-08-29
  • Supported by:
    National Natural Science Foundation of China (11072206); Natural Science Foundation of the Fujian Province,China (2012J01023)

摘要: 同轴旋转圆台环隙内流体的流动是基于经典的两同轴旋转圆柱环隙内泰勒库特流的一种扩展研究。通过流动显示实验和PIV粒子图像测速技术对圆台环隙的内部流场进行可视化和定量化的研究,分析涡运动的周期性规律,探究圆台环隙内雷诺应力分布和水位高度对流场的影响。研究表明,随着时间的发展,涡列周期性明显且整体在下移,当脉冲数为100脉冲/s时,环隙内形成均匀分布的正反交替的涡;当脉冲数为200~500脉冲/s时,存在快慢交替的分裂周期;在3种水位高度下也都存在明显周期性分裂,只是周期时间和涡的个数不同;平均流场存在上凸型外向流和下凹型内向流2种流态,流态的差异是离心力与静压力双重作用的强弱变化所致;雷诺应力分布中,径向正应力占主导,并主要集中在环隙中部。

关键词: 同轴旋转圆台, 泰勒库特流, PIV, 雷诺应力, 分裂周期

Abstract: The research on the flow fluid in the annulus of coaxial rotating conical cylinders originates from the classical Taylor Couette flow in the annulus of two coaxial rotating conical cylinders. This paper uses flow visualization experiments and PIV to display and quantify the internal flow field in the annulus of conical cylinders, and the periodic trends of vortex motions are studied to explore the effect of in-annulus Reynolds stress distribution and water level on the flow field. The study indicates that the periodic trends of vortex column move downward over time, and a series of alternate clockwise and anticlockwise vortices are uniformly distributed inside the annulus where pulse number is 100 pulse/s. There exists the alternating vortex fracture periods where pulse number is between 200-500 pulse/s. Under three different water levels, there exists obvious periodic fracture, but the periodic time and number of vortices are different. There are two types of flow (up-convex outward flow and down-concave inward flow) in the mean flow field, and the type of flow is decided by centrifugal force and static pressure. Radial normal stress dominates in Reynolds stress distribution and mainly exists in the middle of the annulus.

Key words: coaxial rotating conical cylinder, Taylor Couette flow, PIV, Reynolds stress, fracture period

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