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化工学报  2013 

氮气-水两相流流型平滑Wigner三谱切片时频特征

DOI: 10.3969/j.issn.0438-1157.2013.10.012, PP. 3571-3580

Keywords: 平滑Wigner三谱切片,小通道两相流,流型

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Abstract:

将平滑Wigner三谱切片理论应用到混沌序列(Lorenz)、分形序列(Conway)和周期序列(Sin),检验了抗噪、抑制交叉性和能量集中性能力。结果表明:平滑Wigner三谱切片方法在这三方面性能上具有明显的优势,可以应用到现场采集到的波动信号上。在此基础上,对水力直径为1.15mm的矩形小通道内氮气-水两相流型的差压信号进行了研究。通过对流型差压信号平滑Wigner三谱切片、等高线以及二次切片的分析揭示了不同流型的演化规律,同时也为其他不同介质的多相流动特性分析与流型辨识提供了一个新的思路。

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