Development of Pressure Sensitive Paint Suitable to Surface Pressure Measurement in High-Knudsen Number Flows

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  • MORI Hideo
    Department of Micro- and Nano-systems Engineering, Nagoya University
  • NIIMI Tomohide
    Department of Micro- and Nano-systems Engineering, Nagoya University
  • OSHIMA Yusuke
    Department of Micro- and Nano-systems Engineering, Nagoya University
  • HIRAKO Madoka
    Department of Micro- and Nano-systems Engineering, Nagoya University

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Other Title
  • 高クヌッセン数流れ中の表面圧力計測に適した感圧塗料の開発
  • コウクヌッセンスウ ナガレ チュウ ノ ヒョウメン アツリョク ケイソク ニ テキシタ カンアツ トリョウ ノ カイハツ

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The pressure sensitive paint (PSP) technique has the capability to be applied to high Knudsen number flows, such as low density gas flows, micro-flows, and so on. In this study, to inspect the feasibility of PSP for measurement of pressure on a solid surface in high Knudsen number flows, fundamental properties of three types of PSPs [PdTFPP, PdOEP and PtTFPP bound by poly (TMSP)] are examined especially in the range of pressure below 130 Pa (about 1 Torr). Pressure sensitivity against nitrogen monoxide is also examined for the above PSPs, to develop a technique for the composite measurement of the flow field structure and the surface pressure, using NO-LIF and PSP, respectively. As an application of PSP to low density gas flows, we measure the pressure distribution on a jet-impinging solid surface using PdOEP/poly (TMSP) with very high pressure sensitivity.

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