• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Flow Measurement and Instrumentation >X-ray based particle tracking velocimetry - a measurement technique for multi-phase flows and flows without optical access
【24h】

X-ray based particle tracking velocimetry - a measurement technique for multi-phase flows and flows without optical access

机译：基于X射线的粒子跟踪测速技术-一种用于多相流和无光学通道的流的测量技术

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

Information regarding the flow in multi-phase systems, such as bubble columns, is necessary for the design of improved devices, as well as for the validation of computer models. Common optical methods are limited in bubble columns with a large void fraction. The reason that this should be is the difference in the refraction indices of liquid and gaseous phases, which leads to reflection and refraction of light. In addition, in flows without optical access, optical methods cannot be used. The method proposed by these authors in their previous paper regarding X-ray based particle tracking velocimetry (PTV)-called XPTV-resolves these problems. It allows us to measure the velocity three-dimensionally, non-invasive, and in devices without optical access. In bubble columns, X-rays are neither reflected nor refracted at the phase boundaries and the flow is penetrated in straight lines. Therefore, it works independently from the void fraction. This has been proved to be a reliable and useful measurement technique, circumventing the limitations of optical methods. This paper reports the latest improvements in the algorithms designed to track and reconstruct particles, a feature which is explained here in detail. The improved algorithms are applied to measure the hydrodynamic parameters in a bubble column under two different flow conditions.
机译：与多相系统（例如气泡塔）中的流量有关的信息对于设计改进的设备以及验证计算机模型是必需的。常见的光学方法仅限于空隙率较大的气泡塔。之所以如此，是因为液相和气相的折射率不同，从而导致光的反射和折射。另外，在没有光学通路的流中，不能使用光学方法。这些作者在以前的论文中提出的有关基于X射线的粒子跟踪测速（PTV）的方法称为XPTV，解决了这些问题。它使我们能够在无光学访问的设备中以非侵入方式三维地测量速度。在气泡柱中，X射线在相边界处既不反射也不折射，并且流以直线渗透。因此，它独立于空隙率工作。事实证明，这是一种可靠且有用的测量技术，可避免光学方法的局限性。本文报告了用于跟踪和重建粒子的算法的最新改进，此功能将在此处进行详细说明。将改进算法应用于在两种不同流动条件下测量鼓泡塔中的流体力学参数。

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