The use of stationary waterjet for the removal of coating material from the substrate is investigated analytically and experimentally. In the analysis, the cleaning width as a function of standoff distance, water pressure, and nozzle radius is derived by considering the structure of waterjet and the cleaning mechanism. Also derived are the relations of the optimal cleaning standoff distance and maximum cleaning width to the critical cleaning standoff distance, and how the water pressure and nozzle radius affect this critical standoff distance. These derived analytical relations are verified with experimental results.

1.
Abramovich, G. N., The Theory of Turbulent Jets, MIT Press, Cambridge, MA, 1963.
2.
Adler, W. F., “The Mechanisms of Liquid Impact, Treatise on Materials Science and Technology,” Vol. 16, Erosion, Carolyn M. Preece, ed., Academic Press, 1979.
3.
Chao
J. F.
,
Zhou
G.
,
Leu
M. C.
, and
Geskin
E. S.
, “
Characteristics of Abrasive Waterjet Generated Surfaces and Effects of Cutting Parameters and Structure Vibration
,”
ASME JOURNAL OF ENGINEERING FOR INDUSTRY
, Vol.
117
, Nov.
1995
, pp.
516
525
.
4.
Conn, A. F., “Waterjet Cleaning for In-Factory Application,” Proceedings of 11th International Symposium on Jet Cutting Technology, BHRA, Dordrecht, Netherlands, July 1992, pp. 443–449.
5.
Erdmann-Jesnitzer, F., Louis, H., and Wiedemeier, J., “Material Behavior, Material Stressing, Principle Aspects in the Application of High Speed Water Jets,” Proceedings of 4th International Symposium on Jet Cutting Technology, BHRA, Canterbury, England, April 12–14, 1978, pp. 29–44.
6.
Erdmann-Jesnitzer, F., Louis, H., and Wiedemeier, J., “The Action of High Speed Water Jets on Materials, Measurement Methods and Their Practical Application: A Critical Review,” Proceedings of 5th International Symposium on Jet Cutting Technology, BHRA, Hanover, F. R. Germany, June 2–4, 1980, pp. 75–85.
7.
Galecki, G., and Vickers, G., “The Development of Ice Blasting for Surface Cleaning,” Proceedings of 6th International Symposium on Jet Cutting Technology, Guildford, England, April 6–8, 1982, pp. 59–80.
8.
Geskin, E. S., Leu, M. C., Meng, P., Tismenetskiy, L., and Uschitsky, M., “Waterjet In-Situ Equipment Cleaning,” Progress Report to the Emission Reduction Research Center, New Jersey Institute of Technology, Newark, NJ 07102, April 13, 1995.
9.
Haferkamp, H., Louis, H., and Schikorr, W., “Jet-Cleaning Investigation on Polymeric Model Layers,” Proceedings of 7th International Symposium on Jet Cutting Technology, BHRA, Cranfield, England, June 26–28, 1984, pp. 119–134.
10.
Hashish
M.
, and
duPlessis
M. P.
, “
Theoretical and Experimental Investigation of Continuous Jet Penetration of Solid
,”
ASME JOURNAL OF ENGINEERING FOR INDUSTRY
, Vol.
100
, Feb.
1978
, pp.
88
94
.
11.
Hashish
M.
, and
duPlessis
M. P.
, “
Prediction Equations Relating High Velocity Jet Cutting Performance to Standoff Distance and Multipasses
,”
ASME JOURNAL OF ENGINEERING FOR INDUSTRY
, Vol.
101
, Aug.
1979
, pp.
311
318
.
12.
Kang, S-W., Reitter, T., and Carlson, G., “Target Response to the Impact of High-Velocity Non-Abrasive Waterjet,” Proceedings of 7th American Waterjet Conference, Seattle, Vol. 1, Aug. 28–31, 1993, pp. 71–86.
13.
Leu, M. C., Geskin, E. S., Meng, P., Tismenetskiy, L., and Uschitsky, M., “Waterjet In-Situ Cleaning,” Report to IAB Meeting of the Emission Reduction Research Center, The Pennsylvania State University, Nov. 29–30, 1994.
14.
Li, H. Y., Geskin, E. S., and Gordon, E. I., “Investigation of the Pure Waterjet-Workpiece Interaction,” Proceedings of 11th International Symposium on Jet Cutting Technology, BHRA, Dordrecht, Netherlands, July 1992, pp. 3–15.
15.
Louis, H., and Schikorr, W., “Fundamental Aspects in Cleaning with High Speed Water Jets,” Proceedings of 6th International Symposium on Jet Cutting Technology, BHRA, Guildford, England, Apr. 6–8, 1982, pp. 217–228.
16.
Meng, P., Leu, M. C., Geskin, E. S., and Tismenetskiy, L., “Cleaning with High-Pressure Directed Waterjets,” Proceedings of Japan-USA Symposium on Flexible Automation, Boston, MA, July 8–10 1996, pp. 1131–1138.
17.
Ramulu, M., Yeh, H., Wong, K. P., and Raju, S. P., “Photoelastic Investigation of Jet Piercing Process,” Proceedings of 6th US Waterjet Conference, Houston, TX, Aug. 24–27, 1991, pp. 1–16.
18.
Shigley, J. E., Mechanical Engineering Design, McGraw-Hill Co, 1977.
19.
Singh, P. J., Munoz, J., and Chen, W. L., “Ultra-High Pressure Waterjet Removal of Thermal Spray Coatings,” Proceedings of 11th International Symposium on Jet Cutting Technology, BHRA, Dordrecht, Netherlands, July 1992, pp. 461–480.
20.
Springer, G. S., Erosion by Liquid Impact, Scripta Publishing Co., Washington, DC, 1976.
21.
Thiruvengadam, A., “The Concept of Erosion Strength,” Erosion by Cavitation or Impingement, ASTM STP408, 1967.
22.
Watson, J. D., “Thermal Spray Removal with Ultrahigh-Velocity Waterjets,” Proceedings of 7th American Waterjet Conference, Seattle, WA, Aug. 28–31, 1993, pp. 583–598.
23.
Wu, S. S., and Kim, T. J., “An Application Study of Plain Waterjet Process for Coating Removal,” Proceedings of 8th American Waterjet Conference, Houston, TX, Vol. 2, Aug. 26–29, 1995, pp. 779–792.
24.
Xu, J., and Summers, D. A., “Experimental Evaluation of the Performance of Fan Jet Systems,” Proceedings of 12th International Symposium on Jet Cutting Technology, Rouen, France, Oct. 25–27, 1994, pp. 37–46.
25.
Yanaida, K., “Flow Characteristics of Water Jets,” Proceedings of 2nd International Symposium on Jet Cutting Technology, BHRA Fluid Engineering, Bedford, England, 1974, Paper A2.
26.
Yanaida, K., and Ohashi, A., “Flow Characteristics of Water Jets in Air,” Proceedings of 4th International Symposium on Jet Cutting Technology, BHRA, Canterbury, England, vol. 1, April 12–14, 1978, pp. 39–53.
27.
Yanaida, K., and Ohashi, A., “Flow Characteristics of Water Jets in Air,” Proceedings of 5th International Symposium on Jet Cutting Technology, BHRA, Hanover, F. R. Germany, June 2–4, 1980, pp. 33–44.
28.
Zou, C-S., Dang, L., Duan, X., and Cheng, D. Z., “Investigation on Anatomy of Continuous Waterjet for Updating Jet Performance,” Proceedings of 3rd American Waterjet Conference, Pittsburgh, May 21–23, 1985, pp. 160–178.
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