...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Application of the ultrasonic technique and high-speed filming for the study of the structure of air-water bubbly flows
【24h】

Application of the ultrasonic technique and high-speed filming for the study of the structure of air-water bubbly flows

机译：超声技术和高速成膜技术在研究气泡水流结构中的应用

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

Multiphase flows are very common in industry, oftentimes involving very harsh environments and fluids. Accordingly, there is a need to determine the dispersed phase holdup using noninvasive fast responding techniques; besides, knowledge of the flow structure is essential for the assessment of the transport processes involved. The ultrasonic technique fulfills these requirements and could have the capability to provide the information required. In this paper, the potential of the ultrasonic technique for application to two-phase flows was investigated by checking acoustic attenuation data against experimental data on the void fraction and flow topology of vertical, upward, air-water bubbly flows in the zero to 15% void fraction range. The ultrasonic apparatus consisted of one emitter/receiver transducer and three other receivers at different positions along the pipe circumference; simultaneous high-speed motion pictures of the flow patterns were made at 250 and 1000 fps. The attenuation data for all sensors exhibited a systematic interrelated behavior with void fraction, thereby testifying to the capability of the ultrasonic technique to measure the dispersed phase holdup. From the motion pictures, basic gas phase structures and different flows patterns were identified that corroborated several features of the acoustic attenuation data. Finally, the acoustic wave transit time was also investigated as a function of void fraction.
机译：多相流在工业中非常普遍，通常涉及非常恶劣的环境和流体。因此，需要使用非侵入性快速响应技术来确定分散相的保持率。此外，对流结构的了解对于评估所涉及的运输过程至关重要。超声技术可以满足这些要求，并且可以提供所需的信息。在本文中，通过检查声学衰减数据与垂直，向上，空气-水气泡流在零到15％之间的空隙率和流动拓扑的实验数据进行对比，研究了超声技术在两相流中应用的潜力空隙率范围。超声波装置由一个发射器/接收器换能器和三个其他接收器组成，分别位于沿管道圆周的不同位置。同时以250 fps和1000 fps拍摄了流动模式的高速运动图像。所有传感器的衰减数据都显示出系统的，与空隙率相关的行为，从而证明了超声技术测量弥散相滞留的能力。从电影中，确定了基本的气相结构和不同的流动模式，证实了声衰减数据的几个特征。最后，还研究了声波传播时间与空隙率的关系。

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