Ultrafast-response anodized-Aluminum pressure-sensitive paints for unsteady flow measurement

Daiju Numata, Shota Fujii, Hiroki Nagai, Keisuke Asai

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


To apply pressure-sensitive paint (PSP) to unsteady shock-wave phenomena such as shock-obstacle interactions in shock-Tube experiments, anodized-Aluminum PSP (AA-PSP) with ultrafast response was fabricated and its response time to a step pressure change was evaluated by using a shock tube. Phosphoric acid was used as electrolyte in the anodization process, and the anodic alumina with pore diameter as large as 160 nm was successfully fabricated. This improved AA-PSP achieved a response with the time constant of 0.35 μs. This AA-PSP was applied to interactions of a moving shock wave with a circular cylinder. The results show that the improved AA-PSP can visualize the shock reflections and the shock diffractions with the ever-highest spatial and temporal resolution.

Original languageEnglish
Pages (from-to)1118-1125
Number of pages8
JournalAIAA journal
Issue number4
Publication statusPublished - 2017

ASJC Scopus subject areas

  • Aerospace Engineering


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