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Journal of Korean Institute of Fire Science and Engineering 2001;15(1):41-46.
Published online March 31, 2001.
평판하 연기선단의 가시화
한용식김명배오광철유상필
1한국기계연구원 환경설비연구부2한국기계연구원 환경설비연구부3한국과학기술원4한국에너지연구소
A Visualization of Smoke Front under a Horizontal Plate
요약
수평 평판과 충돌하는 제트에 의해 생성되는 연기유동을 관찰하기 위해 질소가스네 kerosene 연기입자를 띄워 유동장을 가시화하였다. 광원으로는 아르곤-이온 레이져 평면광이 사용되었다. Kerosene smoke의 산란 광에 의한 수직평면 상(image)과 수평평면 상을 고속 CCD 카메라와 비디오 카메라로 녹화하였으며, 얻어진 영상으로부터 연기선단의 순간속도 및 평균속도를 측정하였다.
Abstract
The flow induced by a vertically impinging circular jet under a horizontal plate is investigated by visualization technique, using kerosene smoke in nitrogen gas to visualize the vortex flow and impinging flow. The light source was the sheet beam of Ar-Ion laser. The vertical and horizontal images scattering of kerosene smoke were recorded by the high speed CCD camera and the video camera. The instantaneous velocity of the vortex and the mean velocity of the smoke front were measured from the acquisited images.
Key Words: Visualization, Smoke, Ceiling, Impinging jet, Laser sheet


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