水合物分解的噪声研究
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摘要
海洋中水合物在分解后会形成大量气泡并向外辐射噪声信号。基于水合物分解的特点,建立了适用于描述水合物分解的非理想气泡的振动模型,并通过数值方法分别对辐射噪声的频率和辐射声压做了仿真模拟。结合测量二氧化碳水解噪声的实验数据,对分解得到的不同半径气泡辐射噪声频率和声压做了统计分析。结果表明,理论模型与实验结果吻合较好,该研究对监测水合物的泄漏分解等具有重要的意义。
Hydrates in the ocean will form a large number of bubbles and radiate noise signals after dissociation.Based on the characteristics of hydrate dissociation,the vibration model suitable for describing non-ideal bubbles after hydrate dissociation is established.The frequency and pressure of the radiation noise are simulated by numerical methods.By measuring the noise of carbon dioxide hydrolysis,the frequency and sound pressure of bubble radiation noise with different radii are analyzed statistically.The results show that the theoretical model is in good agreement with the experimental results.The study in this paper is of great significance for monitoring the leakage dissociation of hydrate.
Hydrates in the ocean will form a large number of bubbles and radiate noise signals after dissociation.Based on the characteristics of hydrate dissociation,the vibration model suitable for describing non-ideal bubbles after hydrate dissociation is established.The frequency and pressure of the radiation noise are simulated by numerical methods.By measuring the noise of carbon dioxide hydrolysis,the frequency and sound pressure of bubble radiation noise with different radii are analyzed statistically.The results show that the theoretical model is in good agreement with the experimental results.The study in this paper is of great significance for monitoring the leakage dissociation of hydrate.
引文
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[2]SAUTER E J,MUYAKSHIN S I,CHARLOU J L,et al.Methane discharge from a deep-sea submarine mud volcano into the upper water column by gas hydrate-coated methane bubbles[J].Earth and Planetary Science Letters,2006,243(3-4):354-365.
[3]顾兆峰,刘怀山,张志珣.浅层气逸出到海水中的气泡声学探测方法[J].海洋地质与第四纪地质,2008,28(2):129-135.GU Zhaofeng,Liu Huaishan,Zhang Zhixun,et al.Acoustic detecting method for bubbles from shallow gas to sea water[J].Marine Geology and Quaternary Geology,2008,28(2):129-135.
[4]YOON J H,CHUN M K,LEE H.Generalized model for predicting phase behavior of clathrate hydrate[J].AIChE J.2002,48(6):1317-1330.
[5]DIAMOND L W,AKINFIEV N N.Solubility of CO2 in water from-1.5 to 100°C and from 0.1 to 100 MPa:evaluation of literature dataand thermodynamic modelling[J].Fluid Phase Equilib,2003,208(1),265-290.
[6]UDDIN M,COOMBE D.Kinetics of CH4 and CO2 hydrate dissociation and gas bubble evolution via MD simulation[J].Journal of Physical Chemistry A,2014,118(11):1971-1988.