2018 Fiscal Year Final Research Report
Highly-accurate turbulent analysis of multistage transonic axial compressor using the proper orthogonal decomposition
| Project/Area Number |
16K06087
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Iwate University (2018)
Kyushu University (2016-2017) |
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Principal Investigator |
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| Research Collaborator |
FURUKAWA Masato 九州大学
SAITO Seishiro 九州大学
MATSUOKA Akinori 川崎重工業
NIWA Naoyuki 川崎重工業
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Keywords | 大規模数値解析 / 遷音速多段軸流圧縮機 / ガスタービン / 流動損失 / LES |
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| Outline of Final Research Achievements |
A transonic axial compressor is used for advanced high efficient gas turbines. For transonic axial compressors, it is not easy to understand details of internal flow field by experimental tests. It follows that highly accurate prediction of internal flow field with numerical simulation serves as an important design technique. In this study, a large-scale computation of LES (Large Eddy Simulation) with a dense computational mesh was conducted for a transonic axial compressor of a gas turbine. Complicated flow phenomena inside the compressor were clarified by applying the intelligent data mining technique to the LES result obtained. Loss generation corresponding to each flow phenomenon was identified and quantitatively evaluated by calculating the entropy generation rate.
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| Free Research Field |
流体工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では，ガスタービン用遷音速軸流圧縮機について，稠密な計算格子を用いた大規模LES（Large Eddy Simulation）解析を実施した．これまで，多段軸流圧縮機の全段・全周計算は大規模な計算資源を要求するため，稠密格子による高精度な数値予測が困難であり，本研究で実施したような計算は行われてきていない．遷音速多段軸流圧縮機の大規模数値解析により，詳細な流動メカニズム解明および流動損失の定量的評価を実施することができた．本研究で実施した内容は，損失モデル構築につながり，圧縮機空力設計技術の高度化に寄与する．
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