Ma Yu, Zhang Yangrui, Li Song, Sun Weimin, Lewis Elfed
Key Lab of In-Fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001, China.
Optical Fibre Sensors Research Centre, University of Limerick, V94 T9PX Limerick, Ireland.
Sensors (Basel). 2021 Nov 4;21(21):7338. doi: 10.3390/s21217338.
The use of optical fiber probe in two-phase flow measurements is very frequently encountered, especially in the applications of chemical engineering and petroleum industries. In this work, the influence of bubble piercing signals caused by bubble deformation is studied experimentally using a laboratory-prepared wedge-shaped fiber probe in a lab-scale gas-liquid flow generator. A three-dimensional simulation model is established to study the influence of bubble deformation on the piercing signals. A theoretical analysis of the characteristics of the pre-signal influenced by the bubble deformations is undertaken for a wide range of different modeled bubble shapes. Combining the experimental and simulation results, a promising analytical method to estimate the bubble shapes by analyzing the characteristics of pre-signals is proposed. The results of this investigation demonstrate that it is possible to estimate the bubble shapes before the fiber probe contacts the bubble surface. The method developed in this investigation is therefore highly promising for reducing errors caused by deformation during the probe piercing process.
光纤探头在两相流测量中的应用十分常见，尤其是在化学工程和石油工业领域。在本研究中，使用实验室制备的楔形光纤探头，在实验室规模的气液流动发生器中，对气泡变形引起的气泡穿透信号影响进行了实验研究。建立了三维模拟模型，以研究气泡变形对穿透信号的影响。针对多种不同形状的模拟气泡，对受气泡变形影响的预信号特征进行了理论分析。结合实验和模拟结果，提出了一种通过分析预信号特征来估计气泡形状的有效分析方法。本研究结果表明，在光纤探头接触气泡表面之前就有可能估计气泡形状。因此，本研究中开发的方法对于减少探头穿透过程中因变形引起的误差具有很大的前景。
