title: Optimization of anodized-aluminum pressure-sensitive paint by controlling luminophore concentration.
abstract: Anodized-aluminum pressure-sensitive paint (AA-PSP) has been used as a global pressure sensor for unsteady flow measurements. We use a dipping deposition method to apply a luminophore on a porous anodized-aluminum surface, controlling the luminophore concentration of the dipping method to optimize AA-PSP characteristics. The concentration is varied from 0.001 to 10 mM. Characterizations include the pressure sensitivity, the temperature dependency, and the signal level. The pressure sensitivity shows around 60 % at a lower concentration up to 0.1 mM. Above this concentration, the sensitivity reduces to a half. The temperature dependency becomes more than a half by setting the luminophore concentration from 0.001 to 10 mM. There is 3.6-fold change in the signal level by varying the concentration. To discuss an optimum concentration, a weight coefficient is introduced. We can arbitrarily change the coefficients to create an optimized AA-PSP for our sensing purposes.
authors.affiliation: Aerodynamic Research and Development Directorate, Japan Aerospace Exploration Agency/Chofu, Tokyo 182-8522, Japan. sakaue@chofu.jaxa.jp
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Sakaue
authors.forename: Keiko
authors.initials: K
authors.lastname: Ishii
mesh_terms: D000535:Aluminum; D002138:Calibration; D004566:Electrodes; D049449:Luminescence; D008855:Microscopy, Electron, Scanning; D010150:Paint; D011312:Pressure; D013696:Temperature
chemical_list: D000535:Aluminum