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- Tokunaga Yuichiro
- Engineering Research Department, Engineering Division, Eagle Industry Co., Ltd.
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- Inoue Hideyuki
- Engineering Research Department, Engineering Division, Eagle Industry Co., Ltd.
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- Hiromatsu Jun
- Engineering Department, Aerospace Division, Eagle Industry Co., Ltd.
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- Iguchi Tetsuya
- Engineering Department, Aerospace Division, Eagle Industry Co., Ltd.
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- Kuroki Yasuhiro
- Research Unit IV, Research and Development Directorate, Japan Aerospace Exploration Agency
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- Uchiumi Masaharu
- Research Unit IV, Research and Development Directorate, Japan Aerospace Exploration Agency
抄録
Floating ring seals offer an opportunity to reduce leakage flows significantly in rotating machinery. Accordingly, they have been applied successfully to rotating machinery within the last several decades. For rocket turbopump applications, fundamental behavior and design philosophy have been revealed. However, further work is needed to explore the rotordynamic characteristics associated with rotor vibrations. In this study, rotordynamic forces for floating ring seals under rotor's whirling motions are calculated to elucidate rotordynamic characteristics. Comparisons between numerical simulation results and experiments demonstrated in our previous report are carried out. The three-dimensional Reynolds equation is solved by the finite-difference method to calculate hydrodynamic pressure distributions and the leakage flow rate. The entrance loss at the upstream inlet of the seal ring is calculated to estimate the Lomakin effect. The friction force at the secondary seal surface is also considered. Numerical simulation results showed that the rotordynamic forces of this type of floating ring seal are determined mainly by the friction force at the secondary seal surface. The seal ring is positioned almost concentrically relative to the rotor by the Lomakin effect. Numerical simulations agree quite well with the experimental results.
収録刊行物
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- International Journal of Fluid Machinery and Systems
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International Journal of Fluid Machinery and Systems 9 (3), 194-204, 2016
ターボ機械協会、韓国流体機械学会、中国工程熱物理学会、国際水理学会
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キーワード
詳細情報 詳細情報について
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- CRID
- 1390001205296406656
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- NII論文ID
- 130005164230
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- ISSN
- 18829554
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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
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可