레이저 충격파 클리닝에서 발생되는 유동장의 실험적 해석

• 영문명: Experimental analysis of flow field for laser shock wave cleaning
• 발행기관: 한국레이저가공학회
• 저자명: 임현규(H. K. Lim) 장덕석(D. S. Jang) 김동식(D. S. Kim)
• 간행물 정보: 『한국레이저가공학회지』한국레이저가공학회지 제7권 제1호, 29~36쪽, 전체 8쪽
• 주제분류: 공학 > 기계공학
• 파일형태: PDF
• 발행일자: 2004.04.01

영문 초록

  The dynamics of laser-induced plasma/shock wave and the interaction with a surface in the laser shock cleaning process are analyzed by optical diagnostics. Shock wave is generated by a Q-switched Nd:YAG laser in air or with N₂, Ar, and He injection into the focal spot. The shock speed is measured by monitoring the photoacoustic probe-beam deflection signal under different conditions. In addition, nanosecond time-resolved images of shock wave propagation and interaction with the substrate are obtained by the laser-flash shadowgraphy. The results reveal the effect of various operation parameters of the laser shock cleaning process on shock wave intensity, energy-conversion efficiency, and flow characteristics. Discussions are made on the cleaning mechanisms based on the experimental observations.

목차

Abstract
1. 서론
2. 실험
3. 결과 및 고찰
4. 결론
후기
참고문헌

키워드

Laser cleaning Shock wave Optical breakdown Visualization