2002 Fiscal Year Final Research Report Summary
Development of Fast and Highly Accurate Surface Pressure Measurement System with Pressure Sensitive Paints
| Project/Area Number |
12555047
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Fluid engineering
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
MASUDA Mitsuharu KYUSHU UNIVERSITY, Interdisciplinary Graduate School of Engineering Sciences, Professor, 大学院・総合理工学研究院, 教授 (40038097)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUMOTO Naoyuki ISHIKAWAJIMA-HARIMA HEAVY INDUSTRY, Fundamental Engineering Laboratory, Researcher, 基盤技術研究所, 研究員
HANDA Taro KYUSHU UNIVERSITY, Interdisciplinary Graduate School of Engineering Sciences, Research Associate, 大学院・総合理工学研究院, 助手 (30284566)
AOKI Toshiyuki KYUSHU UNIVERSITY, Interdisciplinary Graduate School of Engineering Sciences, Associate Professor, 大学院・総合理工学研究院, 助教授 (20150922)
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| Project Period (FY) |
2000 – 2002
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| Keywords | PRESSURE SENSITIVE PAINTS / PSP / PRESSURE MEASUREMENTS |
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| Research Abstract |
Pressure sensitive paints (PSPs) are a kind of a functional paint. Recently, pressure measurement technique based on these paints is being developed and used for aerodynamic applications. This approach uses the luminescent molecules that emit light whose intensity increases with the decrease in partial pressure of oxygen. This coating can give the surface pressure data with high spacial resolution in the windtunnel testing. In this work, the time-response and the effect of temperature of the PSPs, which were important characteristics in measuring pressure, were obtained experimentally. The PSPs studied in the present works were PtOEP , PtTFPP, H_2TFPP, and H_2TCPP; they were painted on a porous silica thin-layer chromatography (TLC) plate. The following results were obtained.
(1) The emission spectrum of each PSP was measured. The luminescence intensity data in various range of temperature and pressure were accumulated experimentally for each PSP.
(2) The luminescence intensity of a PSP decreases during irradiation due to photodegradation. This phenomenon was measured for each PSP, and the time constant representing the degree of degradation was estimated.
(3) The time-response of the paints was investigated by using a shock tube. Results indicated that the response time was on the order of 20-40 microseconds.
(4) The effect of the sudden change in gas temperature on the luminescence intensity was investigated by using the contact surface of the shock tube flow, and it was found that the luminescence intensity depended only on the wall temperature and was affected little by the gas temperature.
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