A novel sprayable fast-responding pressure-sensitive paint based on mesoporous silicone dioxide particles

Peng, Di; Gu, Feng; Li, Yongzeng

doi:10.1016/j.sna.2018.06.048

Cited by 61 publications

(9 citation statements)

References 24 publications

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“…The formula for fast PSP measurement adopted in the present work was developed in house (Peng et al. 2018). For the fast PSP, we selected Pt(II) meso-tetrakis (pentafluorophenyl) porphine (PtTFPP) as the luminophore and mesoporous silica particles as the host for the luminophore.…”

Section: Methodsmentioning

confidence: 99%

Spanwise unsteadiness in the sidewall-confined shock-wave/boundary-layer interaction

Liu,

Chen,

Zhang

et al. 2024

J. Fluid Mech.

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Three-dimensional effects of sidewalls on the low-frequency unsteadiness of the shock-wave/boundary-layer interaction (SBLI) are of academic and practical importance but not yet well understood. Considerable attention has been paid to the viscous effect of sidewalls, whereas the potential inviscid confinement effect of sidewalls has received little attention. The present work provides experimental evidence of multiscale spanwise travelling waves crossing the separation front under the confinement of sidewalls. Global pressure measurements were made for a sidewall-confined 24 $^\circ$ compression ramp interaction in Mach-2.83 flow using fast-responding pressure-sensitive paint. The unsteady pressure in a statistically two-dimensional intermittent region suggests that in addition to the canonical streamwise oscillation, the separation front exhibits significant low-frequency, multiscale spanwise distortion. Modal analysis further reveals that multiscale spanwise unsteadiness has higher intensity and frequency than the streamwise oscillation. Such strong spanwise unsteadiness calls attention to the low-frequency unsteadiness in previous sidewall-confined SBLI experiments and encourages further study on the mechanism of the confinement effect.

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Section: Methodsmentioning

confidence: 99%

Spanwise unsteadiness in the sidewall-confined shock-wave/boundary-layer interaction

Liu,

Chen,

Zhang

et al. 2024

J. Fluid Mech.

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“…The porous PSP sensor was prepared by dissolving a luminescent molecule of tris(4,7-diphenyl-1,10-phenanthroline) ruthenium(II) (Rudpp) in toluene and then adding the RTV 118 polymer binder and 2 µm diameter hollow SiO 2 mesoporous particles to the mixture. The SiO 2 mesoporous particles were used to increase the oxygen permeability in the polymer binder and those PSP sensors are known as mesoporous PSP (MP-PSP) [17,18], which is a new kind of PC-PSP sensor. Before coating the PSP sensor on AGARD-B, the fuselage of the model was coated with black paint (TS-5, TAMIYA) to reduce the reflection of the PSP signal from the wing.…”

Section: Experimental Methodsmentioning

confidence: 99%

Pressure-sensitive paint measurements with temperature correction on the wing of AGARD-B under transonic flow conditions

Huang¹,

Lin²,

Huang³

et al. 2021

Meas. Sci. Technol.

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This study experimentally examined the flow phenomena and pressure distribution on the wing of Advisory Group for Aerospace Research and Development Model B (AGARD-B) at a Mach number of 0.83. For simultaneous pressure and temperature measurement, a mesoporous pressure-sensitive paint (PSP) sensor was applied to one of the wings of AGARD-B at an angle of attack (AOA) of 0°–8° and a temperature-sensitive paint sensor was applied to the other wing. The collected temperature data were used for pixel-by-pixel temperature correction in a PSP experiment. The pressure distribution obtained on the AGARD-B wing through the PSP experiment with temperature correction agreed well with that obtained through computational flow dynamics (CFD) simulation and accurately indicated the low-pressure regions introduced by the vortex generated from the leading edge at an AOA larger than 4°. The lift coefficient calculated using the PSP data agreed well with that calculated using CFD.

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“…However, the high-speed camera was set to run freely, without synchronization with the pressure transducers. The temperature errors in the experiments were negligible because the ambient temperature and the inlet air temperature remained unchanged, and thus the in uence of temperature was considered to be negligibly small and was ignored in the post-processing procedure (Crafton et al, 2017;Peng et al, 2018).…”

Section: Psp Measurementsmentioning

confidence: 99%

Flow mechanism study and geometrical parameters analysis of fluidic oscillators based on pressure-sensitive paint measurements and modal analysis

Song,

Wang,

Qiu

et al. 2024

Exp Fluids

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The present study optimized some novel uidic oscillator designs, measured their internal-external uid dynamics, and used modal analysis to reveal their underlying oscillation mechanisms. It also investigated the effects of structural parameters on their uid dynamics. The time-resolved internalexternal pressure elds of the oscillators were determined by using pressure-sensitive paint (PSP) measurement. Proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD) were used for modal analysis and phase reconstruction. The time-averaged pressure-eld and phasereconstruction results reveal that recirculation bubbles inside the mixing chamber and the feedback ow have underpinned the mechanism of formation of internal and external continuous sweeping ows. The modal analysis results reveal the spatial modal structures and their time evolution, which dominated the internal-external ow pattern. The inlet-wedge width and feedback-channel inlet diameter were found to be the structural parameters affecting feedback ow and recirculation-bubble size, and thereby in uenced ow characteristics such as jet oscillation frequency and divergence angle. Different Coandă surfaces altered the recirculation bubbles and feedback ow of the mainstream, thereby in uencing the formation mechanism of the sweeping jet.

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A novel sprayable fast-responding pressure-sensitive paint based on mesoporous silicone dioxide particles

Cited by 61 publications

References 24 publications

Spanwise unsteadiness in the sidewall-confined shock-wave/boundary-layer interaction

Spanwise unsteadiness in the sidewall-confined shock-wave/boundary-layer interaction

Pressure-sensitive paint measurements with temperature correction on the wing of AGARD-B under transonic flow conditions

Flow mechanism study and geometrical parameters analysis of fluidic oscillators based on pressure-sensitive paint measurements and modal analysis

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