THERMAL SCIENCE
International Scientific Journal
INFLUENCES OF HYDRODYNAMIC CONDITIONS, NOZZLE GEOMETRY ON APPEARANCE OF HIGH SUBMERGED CAVITATING JETS
ABSTRACT
Based on visualization results of highly-submerged cavitating water jet obtained with digital camera, the influences of related parameters such as: injection pressure, nozzle diameter and geometry, nozzle mounting (for convergent / divergent flow), cavitation number and exit jet velocity, were investigated. In addition, the influence of visualization system position was also studied. All the parameters have been found to be of strong influence on the jet appearance and performance. Both hydro-dynamical and geometrical parameters are playing the main role in behavior and intensity of cavitation phenomenon produced by cavitating jet generator. Based on our considerable previous experience in working with cavitating jet generator, the working conditions were chosen in order to obtain measurable phenomenon. [Projekat Ministarstva nauke Republike Srbije, br. TR35046]
KEYWORDS
PAPER SUBMITTED: 2012-09-25
PAPER REVISED: 2013-04-15
PAPER ACCEPTED: 2013-04-22
PUBLISHED ONLINE: 2013-05-05
THERMAL SCIENCE YEAR
2013, VOLUME
17, ISSUE
Issue 4, PAGES [1139 - 1149]
- Ganippa LC., Bark G., Andersson S., Chomiak J., Comparison of Cavitation Phenomena In Transparent Scaled-Up Single-Hole Diesel Nozzles, CAV, 2001, session A9.005. caltechconf.library.caltech.edu/68/
- Vijay M.M., Zou C., Tavoularis S. A Study of the Characteristics of Cavitating Water Jets by Photography and Erosion, Proceedings of 10th International Conference on Jet Cutting Technology - Elsevier, 1991, pp. 37-67.
- Yamaguchi A., Shimizu S., 1987, Erosion Due to Impingement of Cavitating Jet, Transaction of the ASME, (1987), Vol. 109, pp. 442-447.
- Soyama H., Kumano H., Saka M., A New Parameter to Predict Cavitation Erosion, CAV, 2001, session A3.002.
- Zhou Y.K., Hammitt F.G., Cavitation Erosion Incubation Period, Wear, (1983), Vol. 86, , pp. 299-13
- Soyama, H., Lichtarowicz, A., Lambpard, D., Useful Correlations for Cavitating Jets, the Review of High Pressure Science and Technology, (1998), Vol.7, pp. 1456-1458.
- Sun Z., Kang X.Q., Wang X.H., Experimental System of Cavitation Erosion with Water-Jet , Materials and Design, (2005), Vol. 26, pp. 59-63.
- Hutli E., Nedeljkovic M., Radovic N., Mechanics of Submerged Jet Cavitating Action: Material Properties, Exposure Time and Temperature Effects on Erosion, Archive of Applied Mechanics, (2008), Vol. 78, pp. 329-341.
- Karimi A., Mamouri M., Deformation Induced by Cavitation Collapse, Proceedings of the International Conference on Impact Loading and Dynamic Behaviour of Materials, 1987, Bremen, Deutsche Gesellschaft für Metallkunde eV, Germany.
- Soyama H., Asahara M., Improvement of the Corrosion Resistance of a Carbon Steel Surface by a Cavitating Jet, Journal of Material Science Letters, (1999), Vol. 18, pp. 1953-1955.
- Hutli E., Nedeljkovic M. Frequency in Shedding/Discharging Cavitation Clouds Determined by Visualization of a Submerged Cavitating Jet, Journal of Fluids Engineering, Transaction of the ASME, (2008), Vol. 130, pp. 561-568.
- Keiichi S., Yasuhiro S. Unstable Cavitation Behaviour in a Circular-Cylindrical Orifice Flow. Trans JSME, International Journal, Ser.B, (2002), Vol. 45 No.3, pp. 638-645.
- Soyama H., High-Speed Observation of a Cavitating Jet in Air. Trans ASME, Journal of Fluids Engineering, (2005), Vol. 127, pp. 1095-1101.
- Soyama H., Ikohagi T., Oba R., Observation of the Cavitating Jet in a Narrow Watercourse, Cavitation and Multiphase Flow, ASME, FED, (1994), Vol. 194, pp. 79-82.
- Agrawal A., Prasad A., Measurements within Vortex Cores in a Turbulent Jet, Journal of Fluids Engineering, Transaction of the ASME, (2003), Vol. 125, pp. 561-568.
- Zhai L., et al. (2008), Recent Methods and Applications on Image Edge Detection. Proceedings of the 2008 International Workshop on Education, Technology and Training & 2008 International Workshop on Geo-science and Remote Sensing, Vol.1, IEEE Computer Society, Washington DC, pp. 332-335.
- Lindeberg T., (1998), Edge Detection and Ridge Detection with Automatic Scale Selection, International Journal of Computer Vision, Vol. (30), No.2, pp.117-154.
