Abstract
Pressure sensitive paint (PSP) is an optical technique to measure surface pressure. PSP is now widely used in various wind-tunnel tests, however application to low-speed flow is still one of the most difficult challenges for PSP. Pressure change in low-speed test is quite small, although PSP measurement has various error sources. It is important to understand key-point of low-speed PSP application and minimize the measurement errors. In this study, recent development of PSP techniques for low-speed tests, both steady and unsteady pressure measurement, are discussed.
