Application of lifetime PSP imaging method to a cryogenic wind tunnel

Toshiyuki Kojima, Hiroki Nagai, Keisuke Asai, Kazunori Mitsuo, Yoshimi Iijima, Hirotaka Sakaue

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


The intensity-based method is a most common technique to convert Pressure-Sensitive Paint (PSP) images to surface pressure. However, this method is not suitable for a cryogenic wind tunnel because the thermal equilibrium condition cannot be achieved when the tunnel is stopped to take the wind-off reference image. In the present study, we applied the lifetimebased PSP imaging method to a cryogenic wind tunnel. Using this method, surface pressure can be calculated from two images obtained at the wind-on condition. In this experiment, a circular-arc bump model coated with PtTFPP/PTMSP paint was tested in the JAXA 0.1-m Cryogenic Transonic Wind Tunnel and PSP images were acquired using a UV-LED pulse illuminator and a multi-gated CCD camera. As a result, we succeeded in visualizing surface pressure distribution induced by a shock wave on the model by using lifetime imaging technique. However, nonnegligible deviation from pressure tap data was observed for the lifetime-based PSP data in the region of the model leading- and trailing- edges. Also the lifetime-based PSP data showed relatively rapid deterioration. These anomalies were not observed in the intensity-based PSP data in the same experiment. To use lifetime PSP imaging method for quantitative pressure measurement, photo-physical mechanism behind these anomalies should be clarified.

Original languageEnglish
Title of host publicationCollection of Technical Papers - 44th AIAA Aerospace Sciences Meeting
Number of pages14
Publication statusPublished - 2006
Event44th AIAA Aerospace Sciences Meeting 2006 - Reno, NV, United States
Duration: 2006 Jan 92006 Jan 12

Publication series

NameCollection of Technical Papers - 44th AIAA Aerospace Sciences Meeting


Other44th AIAA Aerospace Sciences Meeting 2006
Country/TerritoryUnited States
CityReno, NV

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering


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