Development of Sprayable Pressure-Sensitive Paint with a Response Time of Less Than 10  μs

Egami, Yasuhiro; Sato, Yudai; Konishi, Shota

doi:10.2514/1.j057434

Cited by 51 publications

(21 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, 1C-PSP has achieved a time response of about 10 µs, comparable to that of 2C-PSP, by reducing the size of the mixed particles from 250 nm to 30 nm and increasing the specific surface area [ 18 , 19 ]. Therefore, we employed 1C- and 2C-PSPs with different particle sizes in this study.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…However, the apparent reason for the nonuniformity of the lifetime remains unclear. In this study, two-typical fast-PSPs, one-component [ 2 , 5 , 18 , 19 ] and two-component [ 3 , 4 , 5 , 20 , 21 , 22 , 23 ] fast-PSPs, were investigated to determine the factors causing the nonuniformity of the luminescence lifetime. The effects of the luminophore solvents, the amount of luminophore applied, binder thickness, and spraying conditions on luminescence lifetime variation were investigated and discussed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of Factors Causing Nonuniformity in Luminescence Lifetime of Fast-Responding Pressure-Sensitive Paints

Egami

Yamazaki

Hori

et al. 2021

Sensors

View full text Add to dashboard Cite

Factors that cause nonuniformity in the luminescence lifetime of pressure-sensitive paints (PSPs) were investigated. The lifetime imaging method of PSP does not theoretically require wind-off reference images. Therefore, it can improve measurement accuracy because it can eliminate errors caused by the deformation or movement of the model during the measurement. However, it is reported that the luminescence lifetime of PSP is not uniform on the model, even under uniform conditions of pressure and temperature. Therefore, reference images are used to compensate for the nonuniformity of the luminescence lifetime, which significantly diminishes the advantages of the lifetime imaging method. In particular, fast-responding PSPs show considerable variation in luminescence lifetime compared to conventional polymer-based PSPs. Therefore, this study investigated and discussed the factors causing the nonuniformity of the luminescence lifetime, such as the luminophore solvent, luminophore concentrations, binder thickness, and spraying conditions. The results obtained suggest that the nonuniformity of the luminophore distribution in the binder caused by the various factors mentioned above during the coating process is closely related to the nonuniformity of the luminescence lifetime. For example, when the thickness of the binder became thinner than 8 μm, the fast-responding PSPs showed a tendency to vary significantly in the luminescence lifetime. In addition, it was found that the luminescence lifetime of fast-responding PSP could be changed in the depth direction of the binder depending on the coating conditions. Therefore, it is important to distribute the luminophore uniformly in the binder layer to create PSPs with a more uniform luminescence lifetime distribution.

show abstract

Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of Factors Causing Nonuniformity in Luminescence Lifetime of Fast-Responding Pressure-Sensitive Paints

Egami

Yamazaki

Hori

et al. 2021

Sensors

View full text Add to dashboard Cite

show abstract

“…The reference pressure in the chamber was maintained at 100 kPa. A second-order polynomial fit can also be used to increase the number of terms to fit the calibration data [11,19]:…”

Section: Static Characterizationmentioning

confidence: 99%

Temperature Effects on Polymer-Ceramic Pressure-Sensitive Paint as a Luminescent Pressure Sensor

Hayashi

Sakaue

2020

Aerospace

View full text Add to dashboard Cite

Polymer-ceramic pressure-sensitive paint (PC-PSP) has been used for capturing unsteady pressure over aerodynamic surfaces. Spatial and temporal pressure information is calculated from the luminescent intensity produced by a PC-PSP, which provides a nonintrusive pressure measurement. Despite its benefits, the temperature dependency of PC-PSP makes extraction of quantitative pressure data challenging. The temperature dependency in terms of the static and dynamic characteristics of a ruthenium-based PC-PSP is studied herein. The impact of temperature dependency on PC-PSP characteristics is also discussed in the context of an unsteady pressure measurement.

show abstract

“…The response time of a PSP with mesoporous silica was developed by Peng et al [ 26 ] to a step pressure input of 100 µs, and its photodegradation rate was 0.4%/min. Egami et al [ 27 , 28 ] improved the response time of a sprayable PC-PSP using tris(bathophenanthroline) ruthenium dichloride (Ru(dpp)

) to less than 10 µs, which is comparable to that of AA-PSPs.…”

Section: Introductionmentioning

confidence: 99%

Frequency Response of Pressure-Sensitive Paints under Low-Pressure Conditions

Kasai

Sasaki

Nagata

et al. 2021

Sensors

View full text Add to dashboard Cite

The characteristics of fast-response pressure-sensitive paints (PSPs) in low-pressure conditions were evaluated. Three representative porous binders were investigated: polymer-ceramic PSP (PC-PSP), anodized-aluminum PSP (AA-PSP), and thin-layer chromatography PSP (TLC-PSP). For each PSP, two types of luminophores, Pt(II) meso-tetra (pentafluorophenyl) porphine (PtTFPP) and tris(bathophenanthroline) ruthenium dichloride (Ru(dpp)3), were used as sensor molecules. Pressure sensitivities, temperature sensitivities, and photodegradation rates were measured and evaluated using a pressure chamber. The effect of ambient pressure on the frequency response was investigated using an acoustic resonance tube. The diffusivity coefficients of PSPs were estimated from the measured frequency response and luminescent lifetime, and the governing factor of the frequency response under low-pressure conditions was identified. The results of static calibration show that PC-PSP/PtTFPP, AA-PSP/Ru(dpp)3, and TLC-PSP/PtTFPP have high pressure sensitivities that exceed 4%/kPa under low-pressure conditions and that temperature sensitivity and photodegradation rates become lower as the ambient pressure decreases. Dynamic calibration results show that the dynamic characteristics of PSPs with PtTFPP are dependent on the ambient pressure, whereas those of PSPs with Ru(dpp)3 are not influenced by the ambient pressure. This observation indicates that the governing factor in the frequency response under low-pressure conditions is the lifetime for PC-PSP and TLC-PSP, whereas the governing factor for AA-PSP is diffusion.

show abstract

Development of Sprayable Pressure-Sensitive Paint with a Response Time of Less Than 10 μs

Cited by 51 publications

References 23 publications

Investigation of Factors Causing Nonuniformity in Luminescence Lifetime of Fast-Responding Pressure-Sensitive Paints

Investigation of Factors Causing Nonuniformity in Luminescence Lifetime of Fast-Responding Pressure-Sensitive Paints

Temperature Effects on Polymer-Ceramic Pressure-Sensitive Paint as a Luminescent Pressure Sensor

Frequency Response of Pressure-Sensitive Paints under Low-Pressure Conditions

Contact Info

Product

Resources

About