抄録
Pressure-sensitive paint (PSP) is an optical pressure measurement technique based on oxygen quenching of photo-excited luminophores. Applications of PSP to unsteady low-speed flow are anticipated in many areas, but the limitation of PSP accuracy makes them difficult. A recent advancement in paint formulation, optical equipment and image processing techniques enables us of acquiring quantitative unsteady-pressure field using PSP. In this paper, two different approaches to this problem, the modified phase-lock method and the conditional image-averaging method are introduced and the results of low-speed wind-tunnel tests are present. These advanced techniques can be applied to unsteady flow even with naturally-disturbed components and their accuracy reaches to Δp_<rms> of 16 Pa.
