Experimental investigation on pressure oscillation induced by steam lateral injection into water flow in a horizontal pipe
Experimental investigation on pressure oscillation induced by steam lateral injection into water flow in a horizontal pipe
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水平管道水流侧向注入蒸汽引起压力振荡的实验研究
DOI：
10.1016/j.ijheatmasstransfer.2019.119024
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发表时间：
2020-02
影响因子：
5.2
通讯作者：
Zhang Zhuohua
中科院分区：
文献类型：
--
作者：
Wang Jie;Lu Tao;Deng Jian;Liu Yu;Lu Qi;Zhang Zhuohua
对水平管内水侧注蒸汽引起的压力振荡进行了实验研究。压力振荡信号由四个动态压力传感器采集。观察到6种典型的压力振荡波形，可分为脉冲振荡和连续振荡两种。描述了六种典型振荡概率密度函数的特征，这些特征与压力振荡类型高度相关。基于概率密度函数，分析了蒸汽质量流量、过冷水流量和温度对压力振荡分布幅值的影响。通过快速傅里叶变换（FFT）得到了第一、第二主频率。不同测点的压力振荡具有相同的第一主频。在低蒸汽质量流量下，第一主频随过冷水温度的升高先增大后减小。在高流量下，第一主频随过冷水温度的升高而减小。此外，当过冷水温度高于60 ℃时，第一主频随过冷水流量的增大而增大，随过冷水温度的增大而减小。
Pressure oscillation induced by steam lateral injection into water flow in a horizontal pipe was investigated experimentally. The pressure oscillation signals were obtained by four dynamic pressure transmitters. Six typical pressure oscillation waveforms were observed, which can be classified into two types: pulse oscillation and continuous oscillation. The characteristics of six typical oscillation probability density function (PDF) are described, which are highly correlated with the types of pressure oscillation. Based on PDF, the effects of steam mass flow rate, subcooled water flow rate and temperature on the amplitude of pressure oscillation distribution were analyzed. Furthermore, the first and second dominant frequency were obtained through the fast Fourier transform (FFT). The pressure oscillations at different measurement points were found to have the same first dominant frequency. The first dominant frequency increases and then decreases gradually with the rising of subcooled water temperature at the low steam mass flow rate. While the first dominant frequency decreases with the increasing of subcooled water temperature at high the mass flow rate. In addition, when subcooled water temperature higher than 60 ℃, the first dominant frequency was found that it increases with the rising of subcooled water flow rate and decreases with the increasing of subcooled water temperature.
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