Abstract

The pressure sensitive paint (PSP) technique has the capability to be applied to high Knudsen number flows, such as low density gas flows, micro-flows, and so on. In this study, to inspect the feasibility of PSP for measurement of pressure on a solid surface in high Knudsen number flows, fundamental properties of three PSPs [PdTFPP, PdOEP and PtTFPP bound by poly(TMSP)] are examined, especially in the range of pressure below. 1-30Pa (about 1 Torr). As an application of PSP to low density, gas flows, we also measure the pressure distribution on a jet-impinging solid surface successfully, using PdOEP/poly(TMSP) with extremely high pressure sensitivity.

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