Investigation of the void fraction-quality correlations for two-phase hydrogen flow based on the capacitive void fraction measurement
Investigation of the void fraction-quality correlations for two-phase hydrogen flow based on the capacitive void fraction measurement
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DOI：
10.1016/j.ijhydene.2019.05.066
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发表时间：
2019-07-05
影响因子：
7.2
通讯作者：
Sato, Tetsuya
中科院分区：
文献类型：
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作者：
Sakamoto, Yuki;Kobayashi, Hiroaki;Sato, Tetsuya
含气率和气相性质是表征气液两相流动的重要参数。然而，无论是已建立的含气率测量方法，还是经过验证的含气率-汽质相互转化模型，都不适用于两相氢气流动。本研究的目的是发展一种含气率测量技术，并研究含气率与质量的相关性。利用电场分析(EFA)和实验设计(DOE)技术研制了一种电容式空泡分数传感器，并将其应用于沸腾氢实验装置中。实验条件为：加热管内径15 mm，质量流量50~110 kg/m(2)S，静压250~300kPaA。比较了热平衡质量(x_i(Ac)=-0.03~0.14)与空泡率(α=0~70%)之间的关系，并研究了适用于沸腾氢气流动的空泡率-实际质量-热平衡质量相互转化模型。观察到，热平衡质量-实际质量转化的Sekoguchi模型和实际质量-空泡率转化的Steiner漂移-通量模型的组合与实验结果符合得很好。(C)2019氢能出版有限责任公司。爱思唯尔有限公司出版。保留所有权利。
The void fraction and vapor quality are important parameters for characterizing the gas-liquid two-phase flow. However, neither an established void fraction measurement method nor a verified void fraction - vapor quality interconversion model is available for the two-phase hydrogen flow. The object of this study is the development of a void fraction measurement technique and the investigation of the void fraction-quality correlations. A capacitive void fraction sensor was developed using the electric field analysis (EFA) and design of experiment (DOE), and it was applied in a boiling hydrogen experimental facility. The experimental conditions were as follows: the inner diameter of the heating pipe was 15 mm, the mass flux was ranged from 50 to 110 kg/m(2)s, and the static pressure was ranged from 250 to 300 kPaA. Further, the correlation between the thermal equilibrium quality (chi(ac) = - 0.03-0.14) and void fraction (alpha = 0-70%) was compared with that obtained in previously proposed models, and the void fraction - actual quality - thermal equilibrium quality interconversion models applicable to the boiling hydrogen flow were investigated. It was observed that the combination of the Sekoguchi model for thermal equilibrium quality - actual quality conversion and the Steiner drift-flux model for actual quality - void fraction conversion agreed well with the experimental results. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.