Time-frequency characteristics of smoothed Wigner tri-spectrum slices of nitrogen-water two-phase flow patterns

LI Hongwei; ZHOU Yunlong; YANG Yue; SUN Bin

doi:10.3969/j.issn.0438-1157.2013.10.012

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Time-frequency characteristics of smoothed Wigner tri-spectrum slices of nitrogen-water two-phase flow patterns

更新时间：2025-12-10

- Time-frequency characteristics of smoothed Wigner tri-spectrum slices of nitrogen-water two-phase flow patterns
- CIESC Journal Issue 10, Pages: 3571-3580(2013)
- 作者机构：
  
  1. 东北电力大学能源与动力工程学院,吉林市,吉林省,132012
  2. 东北电力大学电气工程学院,吉林市,吉林省,132012
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.10.012
  CLC： 359.1
- Online First：05 October 2013，
  
  Published：05 October 2013
- 稿件说明：
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LI Hongwei, ZHOU Yunlong, YANG Yue, et al. Time-frequency characteristics of smoothed Wigner tri-spectrum slices of nitrogen-water two-phase flow patterns[J]. CIESC Journal, 2013, (10): 3571-3580.
DOI：

LI Hongwei, ZHOU Yunlong, YANG Yue, et al. Time-frequency characteristics of smoothed Wigner tri-spectrum slices of nitrogen-water two-phase flow patterns[J]. CIESC Journal, 2013, (10): 3571-3580. DOI： 10.3969/j.issn.0438-1157.2013.10.012.

摘要

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1.15 mm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。

Abstract

In order to test the anti-noise ability

inhibition cross-term interference and ability of concentrating energy

the smoothed Wigner-Ville tri-spectrum theory was applied to fractal sequence(Conway)

chaotic sequence(Lorenz)and periodic sequence(sine signal).The results showed that the smoothed Wigner-Ville tri-spectrum had obvious advantages in these three aspects of performance compared with other Wigner-Ville spectral theories when it was applied to the analysis of field fluctuation signals.On this basis

the differential pressure signals of nitrogen-water two-phase flow in small rectangular channel were studied.By the analysis of the slice

contour and secondary slice of smoothed Wigner-Ville tri-spectrum of different flow patterns

the evolution of different flow patterns was revealed. At the same time

the smoothed Wigner-Ville tri-spectrum theory could provide a new approach to further revelation of flow mechanism and flow pattern identification of multi-phase flow of different media.

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