Anodized aluminum pressure sensitive paint in a cryogenic wind tunnel

Hirotaka Sakaue, John P. Sullivan, Keisuke Asai, Yoshimi Iijima, Tetsuya Kunimasu

Research output: Contribution to journalConference article

54 Citations (Scopus)

Abstract

Anodized aluminum pressure-sensitive paint has been used to measure the surface pressure distributions of wind tunnel models in a cryogenic wind tunnel. A thin, uniform anodized aluminum layer was directly coated onto the wind tunnel models by an electrochemical process. The resulting coating has an extremely high oxygen sensitivity for very low mole fractions of oxygen in the working gas (∼150 ppm). Numerous types of anodized aluminum PSPs were calibrated to optimize the sensitivity and the uniformity and to prevent the aging of anodized aluminum PSP. The luminophore deposition affected the sensitivity, and the phosphoric acid modification improved the uniformity and reduced the aging. To demonstrate this technology, a flat model and a 14% thick circular are bump model were tested in the 0.1 m Transonic Cryogenic Wind Tunnel at NAL. Surface pressure distributions on the models were clearly captured.

Original languageEnglish
Pages (from-to)337-346
Number of pages10
JournalInstrumentation in the Aerospace Industry : Proceedings of the International Symposium
Publication statusPublished - 1999 Dec 1
Externally publishedYes
EventProceedings of the 45th International Instrumentation Symposium - Albuquerque, NM, United States
Duration: 1999 May 21999 May 6

Keywords

  • Anodized Aluminum
  • Cryogenic Wind Tunnel
  • Pressure-Sensitive Paint

ASJC Scopus subject areas

  • Engineering(all)

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