Development of Polymer-Ceramic Pressure-Sensitive Paint and Its Application to Supersonic Flow Field
Pressure-sensitive paint (PSP) has been widely used in aerospace applications. It uses a photophysical process of oxygen quenching to relate the luminescent signals to the oxygen pressures in a testing fluid. It is composed of a luminophore, which gives the luminescent signal, and a supporting matrix, which holds the luminophore onto a testing article. PSP can be categorized by the supporting matrix: polymer PSP and porous PSP. The former uses a polymer as a supporting matrix. Gaseous oxygen needs to permeate into this layer to cause oxygen quenching. This limits the time response of this type of PSP on the order of seconds or sub-seconds. The latter uses a porous material as a supporting matrix. Gaseous oxygen can diffuse into a pore to cause oxygen quenching with a luminophore on the porous surface. The time response of this PSP is on the order of ten microseconds.
KeywordsShock Tube Normal Shock Pressure Sensitivity Testing Article Supporting Matrix
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