海底冷泉区气泡流量流速的声学探测机理研究
发布时间：2018-07-14 11:43
【摘要】：海洋冷泉区常含有巨大资源前景和引发环境灾害的天然气水合物,并发育有依赖于流体化学自养能和养分的特异生物群,研究其泄漏气体的流量和流速,具有重要的资源和环境意义。冷泉区存在大量气泡幕,首先根据声波穿过气泡幕时会产生强烈衰减的特征,对穿过不同气泡流量的声波进行探测,得到气泡流量和声波衰减呈线性比例关系;其次,利用相关流量法对放置于不同深度的两路接收信号进行互相关分析,计算出气泡流的上升速度。在此基础上通过声学探测所得声波幅值,反演出气泡流量;并由气泡的上升速度和流量得出气泡的分布范围,为海洋冷泉区气泡流速流量探测提供了新的方法。
[Abstract]:Marine cold springs often contain huge resource prospects and natural gas hydrates that cause environmental disasters, and develop specific biota dependent on hydrochemical autotrophic energy and nutrients to study the flow and velocity of leaking gases. It has important resource and environmental significance. There are a large number of bubble screens in the cold spring region. Firstly, according to the strong attenuation characteristics of sound wave passing through the bubble curtain, the acoustic wave passing through different bubble flow is detected, and the linear relationship between bubble flow and sound wave attenuation is obtained. The correlation flow method is used to analyze the cross-correlation of two received signals placed at different depths, and the rising velocity of bubble flow is calculated. On this basis, the bubble flow rate is inversely obtained by acoustic detection, and the bubble distribution range is obtained from the rising velocity and flow rate of the bubble, which provides a new method for the detection of bubble velocity and flow rate in the cold spring region of the ocean.
【作者单位】： 杭州电子科技大学海洋工程学院;浙江大学海洋学院;中国科学技术大学工程科学学院;
【基金】：国家自然科学基金重点项目(41276092)~~
【分类号】：P714;P744.4
本文编号：2121541
[Abstract]:Marine cold springs often contain huge resource prospects and natural gas hydrates that cause environmental disasters, and develop specific biota dependent on hydrochemical autotrophic energy and nutrients to study the flow and velocity of leaking gases. It has important resource and environmental significance. There are a large number of bubble screens in the cold spring region. Firstly, according to the strong attenuation characteristics of sound wave passing through the bubble curtain, the acoustic wave passing through different bubble flow is detected, and the linear relationship between bubble flow and sound wave attenuation is obtained. The correlation flow method is used to analyze the cross-correlation of two received signals placed at different depths, and the rising velocity of bubble flow is calculated. On this basis, the bubble flow rate is inversely obtained by acoustic detection, and the bubble distribution range is obtained from the rising velocity and flow rate of the bubble, which provides a new method for the detection of bubble velocity and flow rate in the cold spring region of the ocean.
【作者单位】： 杭州电子科技大学海洋工程学院;浙江大学海洋学院;中国科学技术大学工程科学学院;
【基金】：国家自然科学基金重点项目(41276092)~~
【分类号】：P714;P744.4
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