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.
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.