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Non-Axisymmetric Mass Transfer Phenomenon behind an Orifice in a Curved Swirling Flow
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作者 tsuyoshi takano Takayuki Yamagata +1 位作者 Yuki Sato Nobuyuki Fujisawa 《Journal of Flow Control, Measurement & Visualization》 2013年第1期1-5,共5页
The purpose of this paper is to understand the mechanism of non-axisymmetric wall-thinning that caused a pipe break in the pipeline of the Mihama nuclear power plant in 2004. The wall thinning was caused by the flow a... The purpose of this paper is to understand the mechanism of non-axisymmetric wall-thinning that caused a pipe break in the pipeline of the Mihama nuclear power plant in 2004. The wall thinning was caused by the flow accelerated corrosion which affects low carbon steel pipelines. The mass transfer rate measurement of the wall thinning behind an office in a curved swirling flow is carried out in a closed-circuit water tunnel using a benzoic acid dissolution method. The experimental results indicate that the high mass transfer rate is observed on one side of the pipe behind the orifice, which is similar to the observation of the wall-thinning rate in the Mihama case. This result suggests that the influence of the secondary flow in the long elbow combined with the swirling flow can produce the non-axisymmetric mass transfer phenomenon behind the orifice. 展开更多
关键词 Pipe-Wall THINNING Flow ACCELERATED Corrosion ORIFICE Mass Transfer NUCLEAR Power Plant Benzoic Acid
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