Abstract
Pressure-sensitive paint (PSP) measurement technique gives global pressure information on a testing article. It is a non-intrusive technique, and the luminescent output from the PSP can be related to the pressure. PSP measurement has been widely used in the transonic and supersonic flows. For steady flow conditions, PSP technique is in industrial level. For unsteady flow measurements, PSP technique is in academic level. One of the limitations is the signal level for a single-shot measurement. Even if the response time is fast enough, the signal level limits the camera exposure time that results in a low signal-to-noise measurement We investigate the measurement limitation related to the signal level and the PSP setup. Based on our measurement setup with a spray able PSP, we can measure the pressure distribution on the order of 100 microseconds.
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