Title :
Formulation of pressure sensitive paints for unsteady measurements
Author :
Soumagne-Schweyckart, I. ; Mérienne, M.C. ; Ancelle, J.
Author_Institution :
ONERA, Chatillon, France
fDate :
8/1/2001 12:00:00 AM
Abstract :
One of the main part of Pressure Sensitive Paint (PSP) activity at Onera is devoted to the application of this technique to unsteady measurements. In order to reduce the response time to a few milliseconds, new paints have been developed. The coating we have developed consists of a pyrene derivative covalently linked to silica particles. The grafted silica is mixed with a water soluble alumina and can be sprayed with an airbrush. This paint emits fluorescence when it is excited at 340 nm and its pressure sensitivity is around 90%/bar. An aging test that consists in heating the coating at 60°C at a pressure of 200 mbar for one hour results in no decrease of the emitted intensity. The response time of this paint, defined as the time required to reach 99% of the maximum intensity level, is less than 5 ms
Keywords :
ageing; calibration; coatings; fluorescence; intelligent materials; optical films; optical sensors; organic compounds; phosphors; pressure measurement; wind tunnels; 200 mbar; 340 nm; 340nm; 5 ms; 60 C; 60 degrees C; 90% of maximum intensity; Onera; SiO2; aging test; coating; exposure time one hour; fluorescence; grafted silica; heating; luminescent pressure sensor; paint; pressure 200mbar; pyrene derivative; pyrene molecule; response time 5ms; unsteady measurements; Aging; Coatings; Delay; Fluorescence; Heating; Paints; Pressure measurement; Silicon compounds; Spraying; Testing;
Conference_Titel :
Instrumentation in Aerospace Simulation Facilities, 2001. 19th International Congress on ICIASF 2001
Conference_Location :
Cleveland, OH
Print_ISBN :
0-7803-7022-8
DOI :
10.1109/ICIASF.2001.960232
