THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

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Study and analysis of the cavitating and non-cavitating jets - Part two: Parameters controlling the jet action and a new formula for cavitation number calculation

ABSTRACT
This part of the paper, presents the relation between the working conditions, nozzle geometry, nozzle diameter, and jet behavior. Experimental work has been made by impinging the submerged jets on the copper specimen as a target for a period of time. The mass loss and erosion rate at various conditions were measured, calculated and analyzed. For the visualization, a high-speed camera was used and the obtained data were processed to measure parameters which are used to characterize the clouds. Correlations among the jet dynamic power, the cavity length, erosion rate, and the pertinent experimental parameters are apparent. In addition, formulas are proposed to conveniently compare the efficiency of jetting systems based on working conditions. Based on the mathematical analyses of the obtained results a new form for cavitation number calculation is proposed.
KEYWORDS
PAPER SUBMITTED: 2019-04-28
PAPER REVISED: 2019-07-29
PAPER ACCEPTED: 2019-08-03
PUBLISHED ONLINE: 2019-09-15
DOI REFERENCE: https://doi.org/10.2298/TSCI190428334H
REFERENCES
  1. Soyama, H., Key Factors and applications of cavitation peening. International Journal of Peening Science and Technology, 1(2017), pp.3-60
  2. Hutli, E., et.al., The Ability of Using the Cavitation Phenomenon as a Tool to Modify the Surface Characteristics in Micro and in Nano Level, Tribology International, Elsevier 101(2016),pp.88-97.
  3. Hutli, E., et. Al., Controlled Modification of the Surface Morphology and Roughness of Stainless Steel 316 by a High Speed Submerged Cavitating Water Jet, Applied Surface Science, Elsevier, 458(2018),pp. 293-304
  4. Madadnia, J., et. Al., A Study of Cavitation Induced Surface Erosion in Abrasive Water Jet Cutting Systems, Advanced Materials Research, 53-54(2008),pp. 357362
  5. Hutli, E., et.al., Plastic Deformation and Modification of Surface Characteristics in Nano-and Micro-Levels and Enhancement of Electric Field of FCC Materials Using Cavitation Phenomenon, Mechanics of Materials, 92(2016), pp. 289-298
  6. Hutli, E., Nedeljkovic M., Mechanics of submerged jet cavitating action: Material properties, exposure time and temperature effects on erosion,Archive of Applied Mechanics, 78(2008), pp. 329-341
  7. Zandi, A., et. al., Influence of Nozzle geometry and Injection Conditions on the Cavitation Flow Inside a Diesel Injector, International Journal of Automotive Engineering, 5(2015), pp. 939-954.
  8. Dindar, E., An overview of the application of hydrodinamic cavitation for the intensification of wastewater treatment applications: a review, Innovative Energy & Research, 5(2016), pp.137-144 DOI: 10.4172/2576-1463.1000137
  9. Hutli, E, Nedeljkovic, M., Frequency in shedding/discharging cavitation clouds determined by visualization of a submerged cavitating jet. Journal of Fluids Engineering, ASME 130(2008): 8pages, doi:10.1115/1.2813125
  10. Shimizu, S., et.al., High-speed observations of submerged water jets issuing from an abrasive water jet nozzle, American WJTA Conference and Expo, Organized and Sponsored by the Water Jet Technology Association Houston, Texas, (2007) www.wjta.org/images/wjta/Proceedings/Papers/2007/H4%20shimizu.pdf
  11. Jing, L, Zhipan, N, Jet and Shock Wave from Collapse of Two Cavitation Bubbles, Scientific Reports, 9(2019), pp.1352-1365 doi.org/10.1038/s41598-018-37868-x
  12. Hutli, E., et. Al., The Relation between the High Speed Submerged Cavitating Jet Behaviour and the Cavitation Erosion Process, International Journal of Multiphase Flow, Elsevier, 83(2016), pp.27-38.
  13. Hutli, E., et. al., Experimental Study on the Influence of Geometrical Parameters on the Cavitation Erosion Characteristics of High-Speed Submerged Jets", Experimental Thermal and Fluid Science, Elsevier, 80 (2017), pp. 281-292.
  14. Guoyi, P., Seiji, S., Progress in Numerical Simulation of Cavitating Water Jets, Journal of Hydrodynamics,Ser.B25(2013),pp. 502-509 doi.org/10.1016/S1001-6058(11)60389-3
  15. Soyama, H.,Effect of Nozzle Geometry on a Standard Cavitation Erosion Test Using a Cavitating Jet, Wear, 297(2013), pp. 895-902
  16. Kalumuck, K. M., Chahine, G. L.,The Use of Cavitating Jets to Oxidize Organic Compounds in Water", Proceedings of FJIDSM'98, ASME Fluids Engineering Division Summer Meeting, Washington, USA, 1998
  17. Kalumuck, K., et. al., Remediation and Disinfection of Water Using Jet Generated Cavitation, Fifth International Symposium on Cavitation (CAV2003) Osaka, Japan, 2003.
  18. Hutli E. et. al., Appearance of High Submerged Cavitating Jet: The Cavitation Phenomenon and Sono-Luminescence, Thermal Science: Scientific journal, 17(2013), pp. 1151-1161.
  19. Hutli, E., et. al., Influence of Hydrodynamic Conditions and Nozzle Geometry on Appearance of High Submerged Cavitating Jets. Thermal Science: Scientific journal, 17(2013), pp. 1139-1149.
  20. Soyama, H., Lichtarowicz, A., Useful Correlations for Cavitating Jets, The Review of High-Pressure Science and Technology, 7(1998), pp.1456-1458.
  21. Hutli, E., et. al., An Experimental Investigation of Cavitating Jet Dynamic Power and Cavitation Intensity, ASME International Mechanical Engineering Congress and ExpositionIMECE2010-37488, Vancouver, British Columbia, Canada, 7(2010), pp. 343-35.
  22. Yamaguchi, A., Shimizu, S., Erosion Due to Impingement of Cavitating Jet, Journal of Fluid Engineering, ASME, 109(1987), pp. 442-447.
  23. Soyama, H., Enhancing the Aggressive Intensity of a Cavitating Jet by Means of the Nozzle Outlet Geometry, J Fluid Eng, ASME, 133(2011), pp. 101301-1-101301-11.
  24. Deng, L.,et. al., Effects of Nozzle Inner Surface Roughness on the Cavitation Erosion Characteristics of High-Speed Submerged Jets, Experimental Thermal and Fluid Science, 74(2016), pp. 444-452.