化学工程2011，Vol.39Issue(2)：43-46,4.
水平管泡状流压力信号的功率谱特性比较
Power spectral characteristic comparison of pressure signals of bubbly flow in horizontal pipe
周云龙 1曹茹1
作者信息
- 1. 东北电力大学,能源与机械工程学院,吉林,吉林,132012
- 折叠
摘要
Abstract
To compare the effects of Welch, AR and EV power spectral analysis on the gas-liquid two-phase bubbly flow pressure signal in a horizontal tube, the pressure fluctuation signal of bubbly flow was analyzed.After being denoised by wavelet, the pressure fluctuation signal of bubbly flow was respectively analyzed by Welch, AR, and EV power spectra, and then followed by the analysis and comparison of the three power spectral density figures.The analysis shows that Welch, AR and EV power spectra can all reflect power spectral characteristics of the pressure fluctuation signal of bubbly flow correctly, but their performances are different; the analysis from three aspects of amplitude, variance and resolution concludes that AR power spectrum has the best power spectral performance among the three methods to the gas-liquid two-phase bubbly flow pressure signal in a horizontal pipe.关键词
泡状流/压力信号/Welch功率谱/AR功率谱/EV功率谱Key words
bubbly flow/ pressure signal/ Welch power spectrum/ AR power spectrum/ EV power spectrum分类
数理科学引用本文复制引用
周云龙,曹茹..水平管泡状流压力信号的功率谱特性比较[J].化学工程,2011,39(2):43-46,4.
