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

Hayashi, Tadao; Sakaue, Hirotaka

doi:10.3390/aerospace7060080

Cited by 7 publications

(2 citation statements)

References 21 publications

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“…Tunnel temperature, static pressure, and lab atmospheric pressure were recorded before and after tests. More information about the PSP and its application can be found in [20,21].…”

Section: Methodsmentioning

confidence: 99%

Modal analysis of pressure fields on and around turrets with different protrusions

Bukowski

Kalensky

Gordeyev

et al. 2022

Unconventional Imaging and Adaptive Optics 2022

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Wind tunnel experiments were conducted to measure the unsteady surface pressure field of a hemisphere-oncylinder turret in subsonic flow. These measurements were obtained using pressure transducers coupled with fast response pressure sensitive paint. The surface pressure field data resulting from Mach 0.5 flow (Re D ≈ 2 × 10 6 ) over three different turret protrusion distances were analyzed. Previously, dominant surface pressure modes on the turret were found using proper orthogonal decomposition. The results of which showed that greater turret protrusion into the freestream flow increased the prevalence of spanwise anti-symmetric surface pressure field fluctuations. These anti-symmetric pressure fluctuations are caused by anti-symmetrical vortex shedding. However, when a partially submerged hemispherical turret geometry is used, it was shown that this anti-symmetric mode was of much lower relative energy. This suggests that there is a transition in flow field phenomena as protrusion is changed from partially submerged to a full hemisphere configuration. Further investigation into this so-called "mode switching" is the emphasis of the work presented here. This research heavily relied on modal analysis to identify correlations between turret and wake surface pressure fields. The fluctuations in the surface pressure field around the partial hemisphere were found to be mostly dominated by the wake with little influence from fluidic structures on the turret itself. For the hemisphere and hemisphere-oncylinder configurations, both symmetric and anti-symmetric unsteady separation grew to be the largest influence and was coupled with the wake fluctuations.

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“…Tunnel temperature, static pressure, and lab atmospheric pressure were recorded before and after tests. More information about the PSP and its application can be found in [20,21].…”

Section: Methodsmentioning

confidence: 99%

Modal analysis of pressure fields on and around turrets with different protrusions

Bukowski

Kalensky

Gordeyev

et al. 2022

Unconventional Imaging and Adaptive Optics 2022

View full text Add to dashboard Cite

show abstract

“…When the paint is illuminated by a selected excitation light source, the intensity of the emissions at longer wavelengths is inversely proportional to the amount of local surface pressure (Henry's Law), which corresponds to law of partial pressure (Dalton's Law). A change in temperature also affects the intensity due to thermal quenching [14]. The quantitative surface pressure distribution can be determined based on static calibration of the PSP sensors and the Stern-Volmer equation.…”

Section: Introductionmentioning

confidence: 99%

Global Visualization of Compressible Swept Convex-Corner Flow Using Pressure-Sensitive Paint

Chung

Huang

2021

Aerospace

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This study used pressure-sensitive paint (PSP) and determined the surface pressure distributions for a compressible swept convex-corner flow. The freestream Mach numbers were 0.64 and 0.83. The convex-corner angle and swept angle were, respectively, 10–17° and 5–15°. Expansion and compression near the corner apex were clearly visualized. For the test case of shock-induced boundary layer separation, there were greater spanwise pressure gradient and curved shocks. The acquired PSP data agree with the experimental data measured using the Kulite pressure transducers for a subsonic expansion flow. For a transonic expansion flow, the discrepancy was significant. The assumption of a constant recovery factor is not valid in the separation region, and temperature correction for PSP measurements is required.

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2022

Aero‐Optical Effects

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

Cited by 7 publications

References 21 publications

Modal analysis of pressure fields on and around turrets with different protrusions

Modal analysis of pressure fields on and around turrets with different protrusions

Global Visualization of Compressible Swept Convex-Corner Flow Using Pressure-Sensitive Paint

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