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首页> 外文期刊>International Journal of Heat and Fluid Flow >Experimental investigation of horizontal forced-vibration effect on air-water two-phase flow
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Experimental investigation of horizontal forced-vibration effect on air-water two-phase flow

机译：水平强迫振动对气水两相流影响的实验研究

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In order to investigate the potential seismic vibrations effect on two-phase flow in an annular channel, experimental tests with air-water two-phase flow under horizontal vibrations were carried out. A low speed eccentric-cam vibration module capable of operating at motor speed of 45-1200 rpm (f = 0.75-20 Hz) was attached to an annular channel, which was scaled down from a prototypic BWR fuel sub channel with inner and outer diameters of 19.1 mm and 38.1 mm, respectively. The two-phase flow was operated in the ranges of < j(f)> =0.25-1.00 m/s and < j(g)> = 0.03-1.46 m/s with 27 flow conditions, and the vibration amplitudes controlled by cam eccentricity (E) were designed for the range of 0.8-22.2 mm. Ring-type impedance void meters were utilized to detect the area-averaged time-averaged void fraction under stationary and vibration conditions. A systematic experimental database was built and analyzed with effective maps in terms of flow conditions (< j(g)>-< j(f)>) and vibration conditions (E-f and f-a), and the potential effects were expressed by regions on the maps. In the < j(g)>-< j(f)> maps, the void fraction was found to potentially decrease under vibrations in bubbly flow regime and relatively lower liquid flow conditions, which may be explained by the increase of distribution parameter. Whereas and the void fraction may increase at the region closed to bubbly-to-slug transition boundary under vibrations, which may be explained by the changes of drift velocity due to flow regime change from bubbly to slug flows. No significant change in void fraction was found in slug flow regime under the present test conditions. (C) 2017 Elsevier Inc. All rights reserved.
机译：为了研究环形通道内两相流的潜在地震振动影响，在水平振动条件下进行了气水两相流的实验研究。能够以45-1200 rpm（f = 0.75-20 Hz）的电动机速度运行的低速偏心凸轮振动模块连接到环形通道，该环形通道从具有内径和外径的原型BWR燃料子通道按比例缩小分别为19.1毫米和38.1毫米在27种流动条件下，两相流在 = 0.25-1.00 m / s和 = 0.03-1.46 m / s的范围内运行，并且振动幅度由凸轮控制偏心距（E）设计为0.8-22.2 mm。环形阻抗空隙计用于在固定和振动条件下检测面积平均时间平均空隙率。建立了系统的实验数据库，并根据有效流动条件（-）和振动条件（Ef和fa）进行了分析，并通过区域上的区域表示了潜在影响。地图。在-图中，发现气泡率在气泡流状态和相对较低的液体流动条件下的振动下可能减少，这可以用分布参数的增加来解释。而在振动作用下，气泡分数在靠近气泡-块状过渡边界的区域可能会增加，这可以用从气泡状向块状流动的流动状态变化引起的漂移速度变化来解释。在当前测试条件下，在团状流态中，空隙率没有明显变化。 （C）2017 Elsevier Inc.保留所有权利。

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