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时域波形及其分析技术是不可视管道内两相流流型识别的常用方法。由于这一技术受到气泡流速的影响,容易造成流型识别的混淆。两相流流型分类的直观物理几何意义在于气泡空间尺度(相对于流道水力学当量直径)及其分布。本文论述了流型识别的空间处理技术(气泡的空间波形、气泡相对直径概率密度分布和空间频谱分析),从而使流型识别建立在流型分类的直观物理意义之上。本文给出了用电导探针作传感器,用空间处理技术识别流型的实验结果。空间处理技术识别流型的显著特点是物理意义上的直观和明晰。
Time-domain waveforms and their analysis techniques are common methods for the identification of two-phase flow patterns in invisible pipelines. Because of this technology by the bubble velocity, easily lead to flow pattern recognition confusion. The intuitive physical geometrical significance of the two-phase flow pattern classification lies in the spatial dimensions of the bubble (relative to the hydraulically equivalent diameters of the flow paths) and their distribution. This paper discusses the spatial processing techniques of flow pattern recognition (spatial waveform of bubbles, probability density distribution of bubble relative diameters, and spatial spectrum analysis), so that flow pattern recognition is based on the intuitive physical meaning of flow pattern classification. In this paper, we present the experimental results that the conductivity probe is used as a sensor and the spatial processing technique is used to identify the flow pattern. Spatial processing technology to identify the distinct characteristics of the flow pattern is intuitive and clear physical meaning.