Characterization of luminescent mini-tufts in quantitative flow visualization experiments: Surface flow analysis and modelization

Lin Chen, Tomohiro Suzuki, Taku Nonomura, Keisuke Asai

研究成果: Article査読

6 被引用数 (Scopus)


As a widely used surface flow visualization method, luminescent mini-tuft has become one challenging topic with its practical advantages in quantitative flow measurement. The luminescent mini-tufts method is preferred with its reduced size and increased luminescence, which is suitable for surface visualization measurement. To provide a standard method/procedure in quantitative analysis for luminescent mini-tuft measurement, the current study established an experimental characterization platform of luminescent mini-tufts method and conducted flat-pate model for flow analysis. The experimental system is consisted of wind tunnel and model section, high-speed image data recording system, digital image processing as well as the control system. The digital imaging processing method for result analysis is also explained, which includes the dark current image extraction, averaging, mini-tufts recognition, and tuft inclination angle/tuft angle estimation process. In this study, the steady flow characterization and quantitative flow analysis is conducted on a flat plate model (Re = 1.6 × 105–6.6 × 105), which is combined with hot-wire anemometry to investigate the basic surface flow topology and boundary layer behaviors. The method is shown capable of capturing both the steady and transient behaviors of a surface flow. Luminescent mini-tufts physical model is also established and found good agreement with the experimental results in this study, which in turn support the mini-tufts characterization and selection in practical applications.

ジャーナルExperimental Thermal and Fluid Science
出版ステータスPublished - 2019 5

ASJC Scopus subject areas

  • 化学工学(全般)
  • 原子力エネルギーおよび原子力工学
  • 航空宇宙工学
  • 機械工学
  • 流体および伝熱


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