Journal ArticleDOI
A novel pyrene-based binary pressure sensitive paint with low temperature coefficient and improved stability
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In this paper, a stable binary pressure sensitive paint formulation was developed in which pyrene is covalently bonded to the polymer binder so that paint degradation is prevented, which is due to the loss of pyrene as a result of diffusion and sublimation from the coating.Abstract:
Pyrene-based pressure sensitive paints (PSP) have certain advantages due to their high pressure sensitivity and low temperature coefficient but their major drawback is the paint degradation under wind tunnel conditions. This is due to the loss of pyrene as a result of diffusion and sublimation from the coating. We have developed a novel stable binary PSP formulation in which pyrene is covalently bonded to the polymer binder so that paint degradation is prevented. The coating thus obtained is a siloxane-based hybrid organic-inorganic material. The pressure sensitive paint also contains an additional reference luminophore, which is insensitive to pressure but sensitive to intensity variations on the model surface. The second luminophore is incorporated in the paint to correct for the excitation intensity variations during the wind tunnel experiment. The temperature coefficient of second luminophore exactly cancels the temperature coefficient of the pressure sensitive luminophore, thereby resulting in a binary paint with negligible temperature sensitivity.read more
Citations
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Journal ArticleDOI
Fast Pressure-Sensitive Paint for Flow and Acoustic Diagnostics
TL;DR: The development and capabilities of fast-responding pressure-sensitive paint (fast PSP) are reviewed within the context of recent applications to aerodynamic and acoustic investigations in this article, which is an optical technique for determining surface pressure distributions by measuring changes in the intensity of emitted light, whereas fast PSP is an extension applicable to unsteady flows and acoustics.
Journal ArticleDOI
Encapsulating Pyrene in a Metal–Organic Zeolite for Optical Sensing of Molecular Oxygen
Jia-Wen Ye,Hao-Long Zhou,Si-Yang Liu,Xiao-Ning Cheng,Rui-Biao Lin,Xiao-Lin Qi,Jie-Peng Zhang,Xiao-Ming Chen +7 more
TL;DR: In this paper, pyrene is encapsulated in a metal-organic zeolite SOD [Zn(mim)2] (Hmim = 2-methylimidazole, MAF-4 or ZIF-8) via an in situ loading strategy, giving fluorescence O2-sensing materials not only with fast response, high photostability, and tunable sensitivity but also free of pyrene aggregation/leak and interference by other quenchers.
Journal ArticleDOI
Fast pressure-sensitive paint for understanding complex flows: from regular to harsh environments
Di Peng,Yingzheng Liu +1 more
TL;DR: In this paper, a review summarizes state-of-the-art knowledge on fast-responding pressure-sensitive paint (fast PSP), which has evolved into a powerful experimental tool for studying complex flow problems.
Journal ArticleDOI
Temperature-Compensated Fast Pressure-Sensitive Paint
Di Peng,Christopher Jensen,Thomas J. Juliano,James W. Gregory,Jim Crafton,Steve Palluconi,Tianshu Liu +6 more
TL;DR: In this article, a two-color fast-responding pressure-sensitive paint with temperature correction capability was developed, which uses a platinum porphyrin compound as the pressure sensor with perylene as the reference sensor and a laser dye added to adjust the spectrum distribution and temperature sensitivity of the reference channel.
Journal ArticleDOI
Investigation of the double ramp in hypersonic flow using luminescent measurement systems
TL;DR: In this paper, a double ramp model placed in hypersonic flow at freestream Mach number of 5 was studied using colour Schlieren and luminescent paints consisting of anodized aluminium pressure sensitive paint (AA-PSP) and the temperature-sensitive paint (TSP) technique.
References
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Journal ArticleDOI
Surface Pressure Measurements Using Luminescent Coatings
TL;DR: In this paper, an optical technique is described that is often used nowadays to measure surface pressures on wind tunnel models and flight vehicles using luminescent coatings, which are painted on the model surface, excited by light of appropriate wavelength, and imaged with digital cameras.
Journal ArticleDOI
Temperature- and Pressure-Sensitive Luminescent Paints in Aerodynamics
Journal ArticleDOI
Luminescent barometry in wind tunnels
Janet L. Kavandi,James B. Callis,Martin Gouterman,Gamal Khalil,Daniel Wright,Edmond Green,David N. Burns,Blair McLachlan +7 more
TL;DR: In this paper, a flexible and relatively inexpensive method and apparatus for continuous pressure mapping of aerodynamic surfaces using photoluminescence and imaging techniques is described, where the luminescence intensity is found to be inversely proportional to the partial pressure of oxygen.
Journal ArticleDOI
Dual-luminophor pressure-sensitive paint: I. Ratio of reference to sensor giving a small temperature dependency
Gamal Khalil,Colin D. Costin,Jim Crafton,Grant Jones,Severin Grenoble,Martin Gouterman,James B. Callis,Larry R. Dalton +7 more
TL;DR: A dual-luminophor paint containing both a sensor and a reference luminophor molecule was used in this paper to measure changes in the paint luminescent intensity as a function of pressure change.