| Project/Area Number |
20560172
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Osaka Institute of Technology |
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Principal Investigator |
KAWATA Yutaka Osaka Institute of Technology, 工学部, 教授 (70440930)
|
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| Co-Investigator(Kenkyū-buntansha) |
TSUJIMOTO Yoshinobu 大阪大学, 基礎工学研究科, 教授 (50112024)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2010: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2008: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Keywords | サージ / コンプレッサ(遠心圧縮機) / 自励振動 / タンク / 配管系 / サージ現象 / 遠心コンプレッサ / 不安定特性 / マッハ数効果 / システムの影響 / ターボチャージャ / サージング現象 / コンプレッサ / 回転数効果 / Bファクタ / 不安定(右上がり)特性 / マッハ数(回転数)効果 / 配管特性効果 |
|---|
| Research Abstract |
The phenomena caused by the stall of turbo machinery is greatly different between fan and compressor. In case of compressor, surge phenomena with large pressure oscillation occur and the avoidance of it is very important issue. In this research, the effect of rotational speed on surge phenomena is investigated experimentally by using compressor of turbo charger.
As rotational speed is increased, it became clear that the surge region expands rapidly and it further expands abruptly above 50000rpm.
The effect of tank volume and pipe length is also tested and found that they have large influence on surge phenomena. Especially surge is proved to be extinguished at shorter pipe length of 2.0m under 20000 rpm operation.
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