Abstract
The dynamic response characteristics of Polymer/Ceramic Pressure-Sensitive Paint (PCPSP) were investigated via standing-wave tube and shock tube experiments. The impacts of paint surface roughness, luminophore application method, and basecoat optical density were investigated by studying the paint’s frequency response via an acoustic resonance tube. The impact of the direction of a step change in pressure was studied in the time domain using a shock tube. The frequency response data were compared with existing theoretical models, which indicate that both the effects of luminescent lifetime and diffusion need to be considered for accurate determination of the PC-PSP transfer function. The shock tube results demonstrate that the intensity response to a step decrease in pressure is significantly slower than that to a step increase in pressure and that the response shapes differ. This behavior agrees qualitatively with previous theoretical work and is attributed to coupling of the inherent nonlinearity of the PSP response with the finite diffusion time scale.
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