scholarly journals An Experimental Investigation on Wind-Driven Rivulet/Film Flows over a NACA0012 Airfoil by Using Digital Image Projection Technique

2014 ◽  
Author(s):  
Kai Zhang ◽  
Blake Johnson ◽  
Alric P. Rothmayer ◽  
Hui Hu
Keyword(s):  
Experimental Investigation ◽  
Digital Image ◽  
Projection Technique ◽  
Naca0012 Airfoil ◽  
Image Projection ◽  
Film Flows

scholarly journals Measurement for the Thickness of Water Droplets/Film on a Curved Surface with Digital Image Projection (DIP) Technique

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2409
Author(s):  
Lingwei Zeng ◽  
Hanfeng Wang ◽  
Ying Li ◽  
Xuhui He
Keyword(s):  
Theoretical Analysis ◽  
Systematic Error ◽  
Digital Image ◽  
Systematic Errors ◽  
Curved Surface ◽  
Water Droplets ◽  
Image Projection

Digital image projection (DIP) with traditional vertical calibration cannot be used for measuring the water droplets/film on a curved surface, because significant systematic error will be introduced. An improved DIP technique with normal calibration is proposed in the present paper, including the principles, operation procedures and analysis of systematic errors, which was successfully applied to measuring the water droplets/film on a curved surface. By comparing the results of laser profiler, traditional DIP, improved DIP and theoretical analysis, advantages of the present improved DIP technique are highlighted.

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