ICONE19-44020 Multi-dimensional Two-Phase Flow Measurements in a Large-Diameter Pipe Using Wire-Mesh Sensor
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- KANAI Taizo
- Central Research Institute of Electric Power Industry
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- FURUYA Masahiro
- Central Research Institute of Electric Power Industry
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- ARAI Takahiro
- Central Research Institute of Electric Power Industry
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- SHIRAKAWA Kenetsu
- Central Research Institute of Electric Power Industry
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- NISHI Yoshihisa
- Central Research Institute of Electric Power Industry
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- UEDA Nobuyuki
- Central Research Institute of Electric Power Industry
抄録
The authors developed a method of measurement to determine the multi-dimensionality of two phase flow. A wire-mesh sensor (WMS) can acquire a void fraction distribution at a high temporal and spatial resolution and also estimate the velocity of a vertical rising flow by investigating the signal time-delay of the upstream WMS relative to downstream. Previously, one-dimensional velocity was estimated by using the same point of each WMS at a temporal resolution of 1.0-5.0s. The authors propose to extend this time series analysis to estimate the multi-dimensional velocity profile via cross-correlation analysis between a point of upstream WMS and multiple points downstream. Bubbles behave in various ways according to size, which is used to classify them into certain groups via wavelet analysis before cross-correlation analysis. This method was verified by air-water straight and swirl flows within a large-diameter vertical pipe. A high-speed camera is used to set the parameter of cross-correlation analysis. The results revealed that for the rising straight and swirl flows, large scale bubbles tend to move to the center, while the small bubble is pushed to the outside or sucked into the space where the large bubbles existed. Moreover, it is found that this method can estimate the rotational component of velocity of the swirl flow as well as measuring the multi-dimensional velocity vector at high temporal resolutions of 0.2s.
収録刊行物
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- Proceedings of the ... International Conference on Nuclear Engineering. Book of abstracts : ICONE
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Proceedings of the ... International Conference on Nuclear Engineering. Book of abstracts : ICONE 2011.19 (0), _ICONE1944-_ICONE1944, 2011
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390001205881801728
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- NII論文ID
- 110009957116
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- ISSN
- 24242934
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可