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气液两相流中气泡速度的电磁互相关测量

赵倩 尹武良 陈广

赵倩, 尹武良, 陈广等 . 气液两相流中气泡速度的电磁互相关测量[J]. 北京航空航天大学学报, 2017, 43(11): 2181-2186. doi: 10.13700/j.bh.1001-5965.2017.0081
引用本文: 赵倩, 尹武良, 陈广等 . 气液两相流中气泡速度的电磁互相关测量[J]. 北京航空航天大学学报, 2017, 43(11): 2181-2186. doi: 10.13700/j.bh.1001-5965.2017.0081
ZHAO Qian, YIN Wuliang, CHEN Guanget al. Measurement of bubble velocity in air-liquid two-phase flow based on electromagnetic technique and cross correlation[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(11): 2181-2186. doi: 10.13700/j.bh.1001-5965.2017.0081(in Chinese)
Citation: ZHAO Qian, YIN Wuliang, CHEN Guanget al. Measurement of bubble velocity in air-liquid two-phase flow based on electromagnetic technique and cross correlation[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(11): 2181-2186. doi: 10.13700/j.bh.1001-5965.2017.0081(in Chinese)

气液两相流中气泡速度的电磁互相关测量

doi: 10.13700/j.bh.1001-5965.2017.0081
基金项目: 

国家自然科学基金 61601260

曲阜师范大学科技计划项目 xkj201502

详细信息
    作者简介:

    赵倩 女, 博士, 讲师。主要研究方向:电磁仿真、数值计算

    尹武良 男, 博士, 高级讲师。主要研究方向:电磁检测与成像、智能仪器

    通讯作者:

    赵倩, E-mail: zhaoq0620@126.com

  • 中图分类号: TP206+.1

Measurement of bubble velocity in air-liquid two-phase flow based on electromagnetic technique and cross correlation

Funds: 

National Natural Science Foundation of China 61601260

Science and Technology Plan Project of Qufu Normal University xkj201502

More Information
  • 摘要:

    气液两相流作为一种工业领域中普遍存在的流态,在测量时需考虑气相和液相间的速度差。相较于流动规律平稳的气相而言,研究不稳定的气泡流动状态具有更高的技术难度。本文针对空气-水为工质的两相流中一项重要参数——气泡速度进行测量,引入基于互相关运算的电磁检测方法,通过提高系统激励频率得到较大的检测信号。实验设计了高频(>1 MHz)电磁检测系统,选用垂直上升管道,并在管道的2个平行截面分别安装电磁传感器,每组传感器均包含一个激励线圈及一个接收线圈,对2组接收线圈上的相位信号进行互相关运算,从而求得气泡的速度。实验中,对3种不同速度气泡采集到的信号进行了对比分析,相对误差控制在10%以内,提供了一种完全非接触非侵入的测量气泡速度的方法。此方法可以进行后续补充完善,用于其他工业场合,如金属液中气泡参数的测量等。

     

  • 图 1  主磁场B和二次磁场ΔB的矢量图

    Figure 1.  Vector diagram of primary magnetic field B and second scattered magnetic field ΔB

    图 2  互相关测速原理图

    Figure 2.  Schematic diagram of velocity measurement based on cross correlation

    图 3  MAXWELL Ansoft电磁仿真示意图

    Figure 3.  Diagram of electromagnetic simulation based on MAXWELL Ansoft

    图 4  电磁检测系统结构

    Figure 4.  Structure of electromagnetic testing system

    图 5  测速实验平台

    Figure 5.  Experimental platform of velocity measurement

    图 6  滤波前后的归一化相位信号

    Figure 6.  Normalized phase signal before and after smoothing

    图 7  2组检测信号及其互相关函数

    Figure 7.  Two groups of testing signals and their cross correlation functions

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出版历程
  • 收稿日期:  2017-02-21
  • 录用日期:  2017-05-19
  • 刊出日期:  2017-11-20

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