가속 드라이아이스 snow impact에 의한 도막 제거속도의 측정

나영민; 김호태; 김선근; Young Min Na; Hotae Kim; Sun-Geon Kim

Clean Technology, Vol.10, No.4, 177-187, December, 2004

Export Citation

가속 드라이아이스 snow impact에 의한 도막 제거속도의 측정

Measurement of Coating Removal Rate of Accelerated Dry Ice Snow Impact

나영민, 김호태, 김선근 ^†

중앙대학교 화학공학과, 우)156-756 서울특별시 동작구 흑석동 221 중앙대학교 화학공학과

Young Min Na, Hotae Kim, and Sun-Geon Kim^†

Department of Chemical Engineering, Chung Ang University, Korea

E-mail:

초록

드라이아이스 스노우 젯(dry ice snow jet)을 액체 이산화탄소의 고압팽창에 의해 만들고 운반기체에 의해 더욱 가속시킬 수 있었다. 코팅의 제거기구는 표면 오염입자의 그것과 크게 다르지 않았다. 코팅의 제거를 Hutchings 식으로 정량적으로 표현할 수 있었다. 이들 식에 의한 plot에서 얻은 두개의 매개변수로 코팅의 제거 속도와 단위 이산화탄소의 질량에 의해 제거된 비 코팅면적을 예측할 수 있었으며 아울러 실험데이터의 신뢰도와 실험 에러의 보정도 가능하게 되었다. 노즐 기판 거리와 노즐길이를 바꾸었을 때 얻어진 이들 plot이 한점에서 만날 수 있음을 알 수 있었으며 이점이 jet plume을 모음에서 얻어진 scar 반경의 증대효과와 jet를 확산시킴에서 얻어진 scar 반경 증대효과가 균형을 맞추는 데서 얻어진 것으로 판단된다.

Dry ice snow jet was produced by high-pressure expansion of liquid carbon dioxide and subsequent acceleration by carrier gas flow. Removal mechanism for coating was not so different from that for contaminating particles on the surface. The removal of coating was quantitatively described by Hutchings' equation. The two parameters obtained from the plot, were used to predict the removal rate or the specific coating area removed by a unit mass of carbon dioxide. Their values also enhanced the reliability of the experimental data and enabled the experimental errors corrected. Hutchings' plots obtained with various values of either stand-off distance or nozzle length tends to meet apparently at a single unique point at which the scar-size enlargement by focusing jet plume was balanced with that by spreading it.

Keywords:dry ice snow jet;Hutchings' equation;coating removal rate;specific coating removal area

[References]

Sherman R, Carbon Dioxide Snow Cleaning in Particles on Surfaces 5&6; Detection, Adhesion and Removal, Ed. by Mittal, K.L., VSP, pp221-237 (1999)
Kashu S, Fuchita E, Manabe T, Hayashi C, Deposition of Ultra Fine Particles Using a Gas Jet, Jap. J. Appl. Phys., 23(1984), L910-912
Whitlock WH, Weltmer WR, Clark JD, US Patent 4806171 (1989)
Layden L, Wadlow D, J. Vac. Sci. Technol. A, 8, 3881 (1990)
Sherman R, Whitlock W, J. Vac. Sci. Technol. B, 8, 563 (1990)
Sherman R, Grob J, Whitlock W, J. Vac. Sci. Technol. B, 9, 1970 (1991)
Sherman R, Hirt D, Vane R, J. Vac. Sci. Technol. A, 12, 1876 (1994)
Hill EA, Carbon Dioxide Snow Examination and Experimentation, Precision Cleaning, Feb, 36-39 (1994)
Yoon CN, Kim H, Kim SG, Min BH, Korean J. Chem. Eng., 16(1), 96 (1999)
Miller RC, Fundamental Study of Carbon Dioxide Blasting: An Experimental and Numerical Analysis of Surface Cleaning by a Particle-Laden Turbulent Jet, Ph.D. Dissertation Michigan Technological University (1994)
Shipway PH, Hutchings IM, "Influence of Nozzle Roughness on Conditions in a Gas-Blasting Erosion Rig, Wear 162-164, 148-158 (1994)
Trezona RI, Hutchings IM, Process in Organic Coatings, 41, 85 (2001)

[Related Articles]

[1] Sherman R, Carbon Dioxide Snow Cleaning in Particles on Surfaces 5&6; Detection, Adhesion and Removal, Ed. by Mittal, K.L., VSP, pp221-237 (1999)

[2] Kashu S, Fuchita E, Manabe T, Hayashi C, Deposition of Ultra Fine Particles Using a Gas Jet, Jap. J. Appl. Phys., 23(1984), L910-912

[3] Whitlock WH, Weltmer WR, Clark JD, US Patent 4806171 (1989)

[4] Layden L, Wadlow D, J. Vac. Sci. Technol. A, 8, 3881 (1990)

[5] Sherman R, Whitlock W, J. Vac. Sci. Technol. B, 8, 563 (1990)

[6] Sherman R, Grob J, Whitlock W, J. Vac. Sci. Technol. B, 9, 1970 (1991)

[7] Sherman R, Hirt D, Vane R, J. Vac. Sci. Technol. A, 12, 1876 (1994)

[8] Hill EA, Carbon Dioxide Snow Examination and Experimentation, Precision Cleaning, Feb, 36-39 (1994)

[9] Yoon CN, Kim H, Kim SG, Min BH, Korean J. Chem. Eng., 16(1), 96 (1999)

[10] Miller RC, Fundamental Study of Carbon Dioxide Blasting: An Experimental and Numerical Analysis of Surface Cleaning by a Particle-Laden Turbulent Jet, Ph.D. Dissertation Michigan Technological University (1994)

[11] Shipway PH, Hutchings IM, "Influence of Nozzle Roughness on Conditions in a Gas-Blasting Erosion Rig, Wear 162-164, 148-158 (1994)

[12] Trezona RI, Hutchings IM, Process in Organic Coatings, 41, 85 (2001)