期刊
FLOW MEASUREMENT AND INSTRUMENTATION
卷 20, 期 1, 页码 1-14出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.flowmeasinst.2008.06.006
关键词
Liquid film thickness; Conductance sensor; Electrode optimization; Droplet deposition; Annular flow; Air water; Wavelet transform; Wave; High-speed
A sensor is presented, that allows high-speed measurements of two-phase film flows. The sensor consists of electrodes flush to the wall, that measure the electrical conductance in a liquid film. This sensor has a time resolution of 10 kHz and 64 x 16 measuring points, with a spatial resolution of 3.12 mm(2) and a maximum film thickness range of 0.8 mm. The shape of the sensor electrodes is optimized by calculating the potential field of the liquid film. The calculated sensor characteristic is compared with experimental data received by imposing static liquid films of known thickness on top of the sensor. Further dynamic measurements of co-current air-water flow in a horizontal channel have been conducted, The statistical analysis concerning film thickness distribution and flow patterns is generally in agreement with literature. The high time and spatial resolution allows a wave analysis over a wide range of wavelengths and wave velocities. By using a continuous wavelet transform, a significant amount of additional information has been retrieved, particularly in regard to ripple waves. Preliminary experiments show the ability of the sensor to detect droplet deposition onto the liquid film. An autoregressive filter has been applied to separate droplet impacts from periodic wavy structures. (C) 2008 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据