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Research on Stability of Gray Value of Excited-State Fluorescent Oil Film Based on Variable Light Vector Angle

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  • Hongjiang Qian
  • Xiucheng Dong
  • Zhengyu Zhang

Abstract

In global skin-friction measurement of aircraft, the fluorescent oil film method can characterize the distribution of skin friction well. However, in an actual wind tunnel test, the wing of the aircraft will inevitably produce corresponding vibrations due to the influence of wind, which will change the relative position between fluorescent oil film and UV (ultraviolet) excitation light source (position fixed). This also directly affects gray value imaging of fluorescent oil films. Based on this, a mathematical model is established to judge the stability of the gray value of fluorescent oil film in this vibrational environment; then, the model can be solved to obtain the vibrational range constraint that enables the gray value of fluorescent oil film to be stabilized. In order to simplify the calculation process, the light vector angle is used to describe the constraint, which also makes the results more intuitive. Through experimental analysis and demonstration, the prediction accuracy of this model can reach 95.61%, which has certain practical engineering application significance.

Suggested Citation

  • Hongjiang Qian & Xiucheng Dong & Zhengyu Zhang, 2021. "Research on Stability of Gray Value of Excited-State Fluorescent Oil Film Based on Variable Light Vector Angle," Mathematical Problems in Engineering, Hindawi, vol. 2021, pages 1-12, December.
    • Handle: RePEc:hin:jnlmpe:8632992
    DOI: 10.1155/2021/8632992
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