画像解析法による極低温二相流のボイド率測定に関する研究

• 岡田 航

  早稲田大学基幹理工学術院機械科学専攻 現 全日本空輸(株)

• 佐藤 哲也

  早稲田大学基幹理工学術院機械科学専攻

• 小林 弘明

  国立研究開発法人 宇宙航空研究開発機構

• 前野 徳秀

  早稲田大学基幹理工学術院機械科学専攻

• 坂本 勇樹

  早稲田大学基幹理工学術院機械科学専攻

書誌事項

タイトル別名

• Study on Void Fraction Measurement of Cryogenic Two-Phase Flow by Image Analysis

抄録

The hypersonic air-breathing engine, which is currently under development by Japan Aerospace Exploration Agency (JAXA), uses liquid hydrogen as the fuel. In order to accurately control the fuel flow rate during the start-up, it is essential to measure the heat transfer and pressure drop of the two phase flow. These two characteristics depend on void fraction, flow velocity and flow regime; thus, measurement methods for these values are required to be established. In this study, the void fraction measurement method by the high-speed image analyses has been developed. Two images taken from top and side directions by high-speed cameras of 1000 fps are used for “two-direction semi-automatic analysis”. We also develop “One-direction full automatic analysis” which uses only the side view as a full-automatic and high sampling rate method with little accuracy deterioration. The preliminary verification test using vertical pipe and acrylic ball shows favorable results within 2.2€% error against the theoretical value. A cryogenic experiment using two-phase nitrogen flow was also conducted. Sampling rate of “One-direction full automatic analysis” can be up to 1000 Hz. The difference between the results of two methods was as minor as 5€% when the void fraction was below 30€%.

収録刊行物

• 航空宇宙技術

  航空宇宙技術 14 (0), 163-170, 2015

  一般社団法人 日本航空宇宙学会

キーワード

• Void Fraction
• Cryogenic Two-phase Flow
• Image Analysis

詳細情報

• CRID: 1390282680298164096
• NII論文ID: 130005114653
• DOI: 10.2322/astj.14.163
• ISSN: 18840477
• Web Site: https://www.jstage.jst.go.jp/article/astj/14/0/14_JSASS-D-15-00020/_pdf
• 本文言語コード: ja
• データソース種別:
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