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Investigation of Vortical Flow Field Visualization by Micro Water Droplet and Laser Beam Sheet  

이기영 (공군사관학교 기계공학과)
손명환 (공군사관학교 항공우주공학과)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.6, no.1, 2002 , pp. 55-62 More about this Journal
Abstract
A new off-surface visualization method of using the micro water droplet and laser beam sheet was presented. About a size of 5 to TEX>$10\mu\textrm{m}$ micro water droplet could be made from home-style ultrasonic humidifier, A 3 W Argon ion laser and cylindrical lens were used to generate a laser beam sheet, which interrogate specific cross section of the vortical flow field. Application of this new visualization method was conducted in KAFA small-sized low speed wind tunnel of having the test section of 0TEX>$0.9 m(W){\times}$0.9 m(H){\times}2.1 m(L)$$$. Visualization results show this method relatively easy and safe flow visualization method for wind tunnel testing. Moreover, this method is also make up for the disadvantage of smoke visualization, and can be applied to higher flow velocity range than that of smoke visualization.
Keywords
Micro Water Droplet; Laser Beam Sheet; Flow Visualization;
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