非侵入式电导传感器在两相流局部测量中的应用

Min-Lun Chai, Feng-Jiun Kuo, Shao-Wen Chen, Jong-Rong Wang, Jin-Der Lee, C. Shih
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引用次数: 0

摘要

空隙率是两相流系统的重要参数,准确的测量技术是必不可少的。为了避免侵入式测量产生的失真,本研究选择非侵入式电导传感器来测量垂直矩形管内的局部信号。实验条件为固定的浅水流速(Jw)为0.417m/s,不同的空气流速(Ja)为0.125~0.417m/s。数据采集系统采用NI-6255。结果包括所有信号的三维网格和瞬态信号以及特定传感器的频率。结果表明,非侵入式电导传感器是测量孔隙率的有效方法。
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Application of non-intrusive conductance sensors to local measurement of two-phase flow
Void fraction is an important parameter in two-phase flow system, and an accurate measuring technique is essential. In order to avoid any distortion by an intrusive measurement, the non-intrusive conductance sensor was chosen in this study to measure the local signals in vertical rectangular tubes. The experimental conditions were fixed superficial water velocity (Jw) at 0.417m/s and various superficial air velocity(Ja) at 0.125~0.417m/s. NI-6255 was utilized as the data acquisition system. The results include 3-D mesh of all signals and the transient signal as well as the frequency of specific sensors. It was observed that the non-intrusive conductance sensor is an effective method to measure void fraction.
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