A review of some current research on pressure sensitive paint and thermographic phosphor techniques

Abstract

The paper discusses the development and application activities within the Aero-Physics and Measurement Technology Laboratory at the University of Manchester on pressure sensitive paint and thermographic phosphor optical imaging systems for gas dynamic applications. It provides a brief review of the basic principles, fundamental theory, properties, chemical characteristics and bonding technologies associated with the two systems. A number of case studies are presented, which exhibit the range of applicability, limitations and potential for further development of the technologies.

Two-color thermosensors based on [Y $$_{1-x}$$ 1 - x Dy $$_x$$ x (acetylacetonate) $$_3$$ 3 (1,10-phenanthroline)] molecular crystals

“…3+ is a well known lanthanide ion used for a wide variety of optical applications [22][23][24][25][26][27][28][29][30][34][35][36][37][38][39][40][41][42], with a common application being two-color thermometry (TCT) [22][23][24][25][26][27][28][29][30]34]. TCT using Dy relies on two closely spaced Dy energy levels ( 4 I 15/2 and 4 F 9/2 ) to act as a probe of temperature.…”

“…To this end we are developing temperature sensors based on twocolor thermometry (TCT) phosphors, which can be used in heterogeneous materials to provide spatially resolved thermal imaging. Previously, TCT phosphors based on inorganic crystals have been used to perform temperature imaging in a wide variety of contexts [22][23][24][25][26][27][28][29][30][31][32][33][34], but for our application -inert PBX analogues -we desire to have organic TCT phosphors that have similar mechanical properties to the energetic materials.…”

Transverse jet-cavity interactions with the influence of an impinging shock

“…[32][33][34][35][36][37] The in-house developed PSP technology used in the present study has been successfully applied in a variety of flow conditions and has been found in all cases to provide accurate pressure measurements when compared to conventional pressure transducers. [38][39][40][41][42][43][44] The PSP setup consists of a LaVision Image Intense 12-bit CCD camera with a 590nm long-pass filter mounted on the lens, and UV LEDs with peak wavelength of 390nm were used for image acquisition. Ruthenium is used as the luminohpore molecules in the current recipe.…”

Application of novel pressure-sensitive paint formulations for the surface flow mapping of high-speed jets

“…Pressure-sensitive paints (PSPs) have become useful tools to augment conventional pressure taps in measuring the surface pressure distribution of aerodynamic components [1,2,3,4] not only in conventional supersonic flows [5,6] but also at the micron scale [7]. PSP offers the advantage of non-intrusive global mapping of the surface pressure.…”