레이저 충격파 세정 공정 시 입자 거동 가시화

• 영문명: Visualization of particle behavior in the laser shock cleaning process
• 발행기관: 한국레이저가공학회
• 저자명: 오준호 이정욱 장덕석 이종명 오부국 김동식
• 간행물 정보: 『한국레이저가공학회 학술대회 논문집』2007년도 춘계학술발표대회 논문집, 28~33쪽, 전체 6쪽
• 주제분류: 공학 > 기계공학
• 파일형태: PDF
• 발행일자: 2007.06.30

영문 초록

  Recent researches on cleaning technologies indicate that micro/nano-scale particle on solid surface can be removed successfully by laser-induced plasma/shock waves. Experimental and computational studies have been performed by several researchers. In this work, we visualize the behavior of 10um fluorescent particle in the laser shock cleaning process. The results are compared with those of two dimensional numerical simulations for the hydrodynamics and detachment of the particle including the effect of external blowing of N₂. It is found that the particle motion is sustained for a significantly long time ~ms after the shock passage. Most of the particles are captured by rotating vortices formed downstream of the shock wave. The external blowing by a nozzle eliminates the rotating flow and therefore substantially reduces the chance of particle redeposition.

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