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基于CFD仿真的涡轮流量计动态特性

郭素娜 宋巍 相诺林 刘旭 王帆 赵治月

郭素娜,宋巍,相诺林,等. 基于CFD仿真的涡轮流量计动态特性[J]. 北京航空航天大学学报,2023,49(8):1904-1911 doi: 10.13700/j.bh.1001-5965.2021.0594
引用本文: 郭素娜,宋巍,相诺林,等. 基于CFD仿真的涡轮流量计动态特性[J]. 北京航空航天大学学报,2023,49(8):1904-1911 doi: 10.13700/j.bh.1001-5965.2021.0594
GUO S N,SONG W,XIANG N L,et al. Dynamic characteristics of turbine flowmeter based on CFD simulation[J]. Journal of Beijing University of Aeronautics and Astronautics,2023,49(8):1904-1911 (in Chinese) doi: 10.13700/j.bh.1001-5965.2021.0594
Citation: GUO S N,SONG W,XIANG N L,et al. Dynamic characteristics of turbine flowmeter based on CFD simulation[J]. Journal of Beijing University of Aeronautics and Astronautics,2023,49(8):1904-1911 (in Chinese) doi: 10.13700/j.bh.1001-5965.2021.0594

基于CFD仿真的涡轮流量计动态特性

doi: 10.13700/j.bh.1001-5965.2021.0594
基金项目: 国家自然科学基金 (62173122);河北省创新能力提升计划-京津冀协同创新共同体建设专项(20540301D);河北省自然科学基金重点项目(F2021201031)
详细信息
    通讯作者:

    E-mail:fwang130494461@126.com

  • 中图分类号: TH864

Dynamic characteristics of turbine flowmeter based on CFD simulation

Funds: National Natural Science Foundation of China (62173122);Hebei Province Innovation Capability Enhancement Plan Project- Beijing Tianjin Hebei Collaborative Innovation Community Construction Project (20540301D); Key Project of Hebei Natural Science Foundation (F2021201031)
More Information
  • 摘要:

    航空航天领域对于流量计量的要求愈发严格,研究流量计的动态特性对于提高其在各类环境下的测量性能和在线测量性能具有重要意义。以涡轮流量计为例,通过数值仿真研究了其动态性能。在涡轮流量计入口处分别施加脉冲和阶跃2种干扰信号,通过数据处理,得到系统的幅频特性、相频特性、传递函数和阶跃响应曲线。结果表明:涡轮流量计可以作为一阶系统进行分析,脉动流的频率是影响涡轮流量计性能的主要因素;与5 Hz工况相比,50 Hz工况下幅值比降低了60%;相位差随频率的增加而增大,最大相位差近40°;阶跃响应的速度和阶跃流的大小与阶跃幅值有关,负阶跃产生的时间常数大于正阶跃产生的时间常数。

     

  • 图 1  涡轮流量计模型

    Figure 1.  Turbine flowmeter model

    图 2  涡轮流量计三维仿真流场网格剖分结果

    Figure 2.  Results of 3D simulation flow field grid generation of turbine flowmeter

    图 3  非稳态过程实验装置

    Figure 3.  Unsteady process experimental device

    图 4  信号放大器及数据采集卡

    Figure 4.  Signal amplifier and data acquisition card

    图 5  实验数据及仿真结果对比

    Figure 5.  Comparison of experimental data and simulation results

    图 6  DN25涡轮流量计在不同流量点的频率与幅值比对比

    Figure 6.  DN25 turbine flowmeter comparison in frequency and amplitude ratio at different flow rates

    图 7  DN25涡轮流量计在不同流量点的相位差和频率对比

    Figure 7.  Phase difference and frequency comparison of DN25 turbine flowmeter at different flow rates

    图 8  t1t2示意图

    Figure 8.  Diagram of t1 and t2

    图 9  涡轮流量计传递函数幅频特性曲线

    Figure 9.  Amplitude-frequency characteristic curve of turbine flowmeter transfer function

    图 10  归一化处理后涡轮流量计相同流量点处不同阶跃幅值的阶跃响应

    Figure 10.  Step response of turbine flowmeter with different step amplitudes at the same flow rate after normalization

    图 11  DN25涡轮流量计各流量点不同阶跃幅值下正负阶跃响应的时间常数

    Figure 11.  Time constant of positive and negative step responses of DN25 turbine flowmeter under different step amplitudes at each flow rate

    表  1  涡轮流量计尺寸参数

    Table  1.   Turbine flowmeter dimension parameters

    参数数值
    涡轮口径/mm25
    叶片个数4
    叶轮长度/mm9.00
    叶片厚度/mm0.60
    导程/mm41.00
    外缘半径/mm12.00
    轮毂半径/mm5.40
    涡轮总长/mm20.2
    壳体半径/mm5.30
    轴半径/mm1.00
    前轴长/mm8.70
    后轴长/mm5.60
    下载: 导出CSV

    表  2  正弦脉动流动中各工况点参数

    Table  2.   Parameters of each working point in sinusoidal pulsating flow

    流量点${{q} }_{0}$/(m3·h−1 幅值${{q} }_{\mathit{A} }$/(m3·h−1 脉动频率${f}$/Hz
    1.60.18,0.36,0.54,0.78 5/10/15/20/30/40/50
    30.3,0.6,0.9,1.2
    6 0.3,0.6,0.9,1.2
    下载: 导出CSV

    表  3  阶跃流动中各工况点参数

    Table  3.   Parameters of each working point in step flow

    流量点${{q} }_{0}$/(m3·h−1幅值${{q} }_{\mathit{A} }$/(m3·h−1
    1.6 0.162,0.318,0.48,0.642
    2.50.252,0.498,0.75,1.002
    40.24,0.6,0.9,1.2
    70.24,0.6,0.9,1.2
    10 0.24,0.6,0.9,1.2
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-10-09
  • 录用日期:  2021-11-11
  • 网络出版日期:  2022-01-11
  • 整期出版日期:  2023-08-31

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