Title :
Open-system pressure sensitive paint for surface pressure measurements in a cryogenic wind tunnel
Author :
Sakaue, Hirotaka ; Sullivan, John P. ; Egami, Yasuhiro ; Iijima, Yoshimi ; Asai, Keisuke ; Engler, Rolf H. ; Beifuss, Uwe ; Döring, Frank
Author_Institution :
Sch. of Aeronaut. & Astronaut., Purdue Univ., West Lafayette, IN, USA
fDate :
8/1/2001 12:00:00 AM
Abstract :
Pyrene-, ruthenium-, and porphyrin-based, anodized aluminum pressure sensitive paint (AA-PSP) is developed for surface pressure measurements in a cryogenic wind tunnel. These AA-PSPs were calibrated to determine the pressure sensitivity by injecting a small amount of oxygen in the test gas. The mole fraction of oxygen was varied from 4 ppm up to 2000 ppm. The calibration tests were conducted in the 0.1 m Transonic Cryogenic Wind Tunnel (TCWT) at National Aerospace Laboratory, Japan. Luminophore choice affected the pressure sensitivity with a pyrene-based AA-PSP having the best sensitivity. These AA-PSPs were applied for surface pressure measurements on a 14% thick circular arc-bump model in the TCWT. The results of pyrene- and ruthenium-based AA-PSPs showed good agreement with pressure taps. Pressure sensitivity, signal level, and uniformity of luminescent coating affected the pressure measurements
Keywords :
calibration; cryogenics; flow visualisation; fluorescence; optical sensors; pressure measurement; pressure sensors; transonic flow; wind tunnels; anodized aluminum; calibration tests; circular arc-bump model; cryogenic wind tunnel; high Reynolds number transonic: flow; luminescent coating; luminophore choice; open-system pressure sensitive paint; porphyrins; pressure taps; pyrenes; ruthenium complexes; surface pressure measurements; Aerospace testing; Aluminum; Cryogenics; Extraterrestrial measurements; Laboratories; Optical surface waves; Paints; Pressure measurement; Space technology; Temperature sensors;
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.2001.960250
