• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Fifth European Conference on Underwater Acoustics (ECUA 2000) Vol.1 Jul 10-13, 2000 Villeurbanne >AN EVALUATION OF A 3D ACOUSTIC COHERENT DOPPLER CURRENT PROFILER IN THE MARINE ENVIRONMENT
【24h】

AN EVALUATION OF A 3D ACOUSTIC COHERENT DOPPLER CURRENT PROFILER IN THE MARINE ENVIRONMENT

机译：海洋环境中3D声学相干多普勒电流谱的评估

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A 3D Acoustic Coherent Doppler Velocity Profiler (3dCDVP) has been developed to measure tri-axial components of flow and tested for the first time in the field. The instrument was deployed in the Barra Nova Tidal Inlet, Algarve, Portugal where it collected data over a period of six weeks during the INDIA (INlet Dynamics Initiative Algarve) project field campaign. The reason for the development is to enable measurements of intra-wave and boundary layer turbulence in the near-bed region. This will aid the study and parameterisation of sediment transport processes. The principle of operation is similar to that employed by uni-axial coherent profilers, wherein a column of water extending in a narrow beam from the acoustic transponder is insonified with a short duration acoustic pulse. The Doppler shifted, back-scattered return from suspended particles moving with the flow is processed coherently to arrive at a radial flow velocity. In the 3D system, two receivers with a fan pattern response are added. These transducers are positioned orthogonally such that they 'see' the insonified water column and these signals are processed in the same manner to determine the off-axis components of flow. To determine the potential of the 3dCDVP, an ADV was also deployed and the data compared. An outline of the design is presented, in addition to an inter-comparison of the results and 3d vector plots of fluid flow.
机译：已经开发出一种3D声学相干多普勒速度剖面仪（3dCDVP）来测量流量的三轴分量，并在现场进行了首次测试。该仪器已部署在葡萄牙阿尔加维的Barra Nova潮汐入口处，在印度（INlet Dynamics Initiative阿尔加维）项目野外活动期间，它在六周的时间内收集了数据。进行这种开发的原因是为了能够测量近床区的波内和边界层湍流。这将有助于沉积物传输过程的研究和参数化。工作原理类似于单轴相干轮廓仪所采用的原理，其中一列水从声应答器以窄波束延伸，并以短时声脉冲声化。与流动一起运动的悬浮粒子产生的多普勒频移，后向散射回波被相干处理，以达到径向流速。在3D系统中，添加了两个具有扇形响应的接收器。这些换能器正交放置，以使其“看到”声波过的水柱，并且以相同方式处理这些信号以确定流量的轴外分量。为了确定3dCDVP的潜力，还部署了ADV并比较了数据。除了结果的相互比较和流体流动的3d矢量图外，还提出了设计的大纲。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号