2022 Fiscal Year Final Research Report
Development of PSP measurement system for detecting fien differential pressure on the surface of rotating blade
| Project/Area Number |
20K04292
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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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| Review Section |
Basic Section 19010:Fluid engineering-related
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| Research Institution | Aichi Institute of Technology |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
松田 佑 早稲田大学, 理工学術院, 教授 (20402513)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 感圧塗料 / 差分計測 / 微小圧力変動 / 高精度計測 / 光電子増倍管 / 回転体 / 面計測 |
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| Outline of Final Research Achievements |
A differential pressure measurement technique was developed to measure minute pressure fluctuations accurately using pressure-sensitive paint (PSP). Since PSP is an absolute pressure sensor, the change in luminescence intensity due to pressure fluctuations of 100 Pa near atmospheric pressure is less than 0.1%, which is an insufficient resolution for the current high-speed cameras. The analog output signal from the photomultiplier tube (PMT) is separated into AC and DC components by a signal filter, and the small AC component is amplified for high-resolution measurement to improve accuracy. As a result, it was demonstrated that a two-dimensional pressure fluctuation field with an amplitude of 20 Pa at 1300 Hz could be measured without any special signal post-processing to remove noise.
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| Free Research Field |
流体力学，航空工学
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| Academic Significance and Societal Importance of the Research Achievements |
物体表面の微小な圧力変動を高い精度で計測するために光電子増倍管を用いて感圧塗料からの発光の変動成分だけを増幅して差分計測する方法を開発した．これにより高度な信号処理を用いずとも，圧力変動を点計測で155HzのΔP~5Pa, 面計測で1300hzでΔP~20Paで計測できることを示した．これにより，従来の高速度カメラでは計測できなかった微小圧力変動を高精度で計測する手法を確立することができた．
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