摘要
海底甲烷渗漏可能会影响海洋环境,乃至影响全球气候和碳循环,但目前人们对渗漏甲烷在海水中的运动行为了解有限。本文基于水体甲烷释放室内实验,研究了不同甲烷渗漏条件下的甲烷气泡行为及其运动特征。结果显示,甲烷气泡在上浮过程中发生合并、分离和破碎,运动轨迹呈“S”形;气泡尺寸及上浮速度随释放气体流量增大而增大;气泡运动还受水中障碍物影响,具体作用与释放气体流量、障碍物表面粗糙度及形态有关。采用日本水合物试采数据开展甲烷喷发式释放模拟实验发现,短期释放大量甲烷会引起水流速度和动压力显著增大。此外,水体甲烷吸附实验表明,经白炭黑疏水处理后,活性炭吸附甲烷能力可提高5%。
Methane leaked from the seabed may affect the marine environment, as well as the global climate and carbon cycle. However, we have limited knowledge of the movement of methane bubbles in the water column. Based on the laboratory experiments of methane release in water, the movement and characteristics of methane bubbles under different methane leakage conditions are studied. It is shown that methane bubbles merge, separate and break during their rise, and the movement path shows “S” shape. The bubble size and rising velocity increase with the amount of gas increasing. The bubble movement is also affected by the obstacles in water, which is related to the amount of gas released, the roughness and shape of the obstacle surface. Using the data of natural gas hydrate production test in Japan, it is found that the short-term release of a large amount of methane will induce prominent increase in the velocity and dynamic pressure of the water. In addition, the methane adsorption experiments in water show that the adsorption capacity of activated carbon could be increased by 5% after hydrophobic treatment.
作者
苏丹仪
梁前勇
郭斌斌
夏真
夏志东
董一飞
蒋苏梦
吴学敏
肖曦
张亭亭
杨林
贺会策
钟超
吴晓钰
SU Danyi;LIANG Qianyong;GUO Binbin;XIA Zhen;XIA Zhidong;DONG Yifei;JIANG Sumeng;WU Xuemin;XIAO Xi;ZHANG Tingting;YANG Lin;HE Huice;ZHONG Chao;WU Xiaoyu(Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,Guangdong,China;National Engineering Research Center of Gas Hydrate Exploration and Development,Guangzhou 510075,Guangdong,China;Guangzhou Marine Geological Survey,China Geological Survey,Ministry of Natural Resources,Guangzhou 510075,Guangdong,China;School of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China)
出处
《实验力学》
CSCD
北大核心
2022年第5期731-744,共14页
Journal of Experimental Mechanics
基金
南方海洋科学与工程广东省实验室(广州)重大专项创新团队项目(No.GML2019ZD0307)
广东省重点领域研发计划项目(No.2020B1111510001)
中国地质调查局海洋地质调查项目(No.DD20190218,No.GZH201100311)。
关键词
甲烷气泡
室内实验
运动
吸附
methane bubble
laboratory experiments
movement
adsorption
