Fourier and Wavelet Transform Analysis of Pressure Signals during Explosive Boiling
YIN Tie-Nan1,2, HUAI Xiu-Lan1
1Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 1000802Graduate School of the Chinese Academy of Sciences, Beijing 100049
Fourier and Wavelet Transform Analysis of Pressure Signals during Explosive Boiling
YIN Tie-Nan1,2;HUAI Xiu-Lan1
1Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 1000802Graduate School of the Chinese Academy of Sciences, Beijing 100049
摘要The transient pressure in a liquid-pool during explosive boiling of acetone is measured by a micro-pressure-measuring system. The Fast Fourier transform and continuous wavelet transform methods are applied to investigate the frequency characteristics. The results show that the dominant frequency of the explosive boiling is 0--2MHz, and the bubble cluster formed by numerous tiny bubbles departs twice. Analysis and discussions are also conducted to explain the bubble evolution during the explosive boiling.
Abstract：The transient pressure in a liquid-pool during explosive boiling of acetone is measured by a micro-pressure-measuring system. The Fast Fourier transform and continuous wavelet transform methods are applied to investigate the frequency characteristics. The results show that the dominant frequency of the explosive boiling is 0--2MHz, and the bubble cluster formed by numerous tiny bubbles departs twice. Analysis and discussions are also conducted to explain the bubble evolution during the explosive boiling.
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2008, Vol. 25 
