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运用现代数字信号处理技术,对垂直上升管水/水蒸气两相流不同流型时的压差波动信号特性进行了分析研究,提出了基于压差波动特征的两相流流型的客观识别方法。通过提取压差波动信号的功率谱分布特征,表明利用功率谱随频率的分布特性的均方根可客观识别出泡状流、间歇流和环状流。
By using modern digital signal processing technology, the characteristics of differential pressure fluctuation signal of vertical rising pipe water / steam two-phase flow in different flow patterns are analyzed and studied, and the objective identification method of two-phase flow pattern based on differential pressure fluctuation characteristics is proposed . By extracting the power spectrum distribution characteristics of the pressure fluctuation signal, it is shown that bubble flow, intermittent flow and annular flow can be objectively identified by using the root mean square of the power spectrum with frequency distribution.