- Fluid and Power Machinery
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Effects of area discontinuity at nozzle inlet on the characteristics of self-resonating cavitating waterjet
Chinese Journal of Mechanical Engineering volume 29, pages 813–824 (2016)
Abstract
The current research on self-resonating cavitating waterjet(SRCW) mainly focuses on the generation mechanism and structure optimization. Researches relating to the influences of disturbances at nozzle inlet on the characteristics of the jet are rarely available. In order to further improve the performance of SRCW, effects of area discontinuity(enlargement and contraction) are experimentally investigated using three organ-pipe nozzles. Axial pressure oscillation peak and amplitude as well as aggressive erosion intensity of the jet are used to evaluate the effects. The results reveal that area enlargement and contraction affect the peak differently, depending on the inlet pressure, nozzle geometry, and standoff distance; while area contraction always improves the amplitude regardless of these factors. At inlet pressures of 10 MPa and 20 MPa, area discontinuity improves the peak at almost all the testing standoff distances, while this only happens at smaller standoff distances with the inlet pressure increased to 30 MPa. The capability of area discontinuity for improving the amplitude is enhancing with increasing inlet pressure. Moreover, the cavitation erosion ability of the jet can be largely enhanced around the optimum standoff distance, depending on the type of area discontinuity and nozzle geometry. A preliminary analysis of the influence of area discontinuity on the disturbance waves in the flow is also performed. The proposed research provides a new method for effectively enhancing the performance of SRCW.
References
ZELENAK M, FOLDYNA J, SCUCKA J, et al. Visualization and measurement of high-speed pulsating and continuous water jets[J]. Measurement, 2015, 72: 1–8.
AYED Y, ROBERT C, GERMAIN G, et al. Development of a numerical model for the understanding of the chip formation in high-pressure water-jet assisted machining[J]. Finite Elements in Analysis and Design, 2016, 108: 1–8.
LIU Songyong, LIU Xiaohui, CHEN Junfeng, et al. Rock breaking performance of a pick assisted by high-pressure water jet under different configuration modes[J]. Chinese Journal of Mechanical Engineering, 2015, 28(3): 607–617.
HUTLI E, BONYAR A, OSZETZKY D, 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[J]. Mechanics of Materials, 2016, 92: 289–298.
HAN Bing, ZHANG Hai, YU Xiaoguang, et al. Numerical simulation and verification of cavitation behavior in water-jet cavitation peening processing[J]. Chinese Journal of Mechanical Engineering, 2012, 48(15): 193–198.
YANG Minguan, XIAO Shengnan, KANG Can, et al. Effect of geometrical parameters on submerged cavitation jet discharged from profiled central-body nozzle[J]. Chinese Journal of Mechanical Engineering, 2013, 26(3): 476–482.
LIU Yong, WEI Jianping, REN Ting, et al. Experimental study of flow field structure of interrupted pulsed water jet and breakage of hard rock[J]. International Journal of Rock Mechanics and Mining Sciences, 2015, 78: 253–261.
ZHANG Fenghua, LIU Haifeng, XU Junchao, et al. Experimental investigation on noise of cavitation nozzle and its chaotic behavior[J]. Chinese Journal of Mechanical Engineering, 2013, 6(4): 758–762.
LEHOCKA D, KLICH J, FOLDYNA J, et al. Copper alloys disintegration using pulsating water jet[J]. Measurement, 2016, 82: 375–383.
LI, Deng, KANG Yong, WANG Xiaochuan et al. Effects of nozzle inner surface roughness on the cavitation erosion characteristics of high speed submerged jets[J]. Experimental Thermal and Fluid Science, 2016, 74: 444–452.
CONN A F, JOHNSON V E, LIU H, et al. Evaluation of CAVIJET cavitating jets for deep-hole rock cutting[R/OL]. Hydronautics, Inc., Laurel, MD, USA, 1981, No. SAND–81–7067. http://www.osti.gov/scitech/biblio/6515979.
CHAHINE G.L., KALUMUCK K.M., FREDERICK G.S. The use of self-resonating cavitating water jets for rock cutting[C]//Proceedings of the 8th American Water Jet Conference, Houston, USA, 1995: 765–778.
CHAHINE G L, JOHNSON V E. Mechanics and applications of self-resonating cavitating jets[C]//International Symposium on Jets and Cavities, ASME, Miami, USA, 1985.
HUSSAIN A K M F, HASAN M A Z. The whistler-nozzle phenomenon[J]. Journal of Fluid Mechanics, 1983, 134: 431–458.
CHAHINE G L, JOHNSON V E, KALUMUCK KM, et al. Internal and external acoustics and large structures dynamics of cavitating self-resonating water jets[R/OL]. Sandia National Labs., Albuquerque, NM, USA; Tracor Hydronautics, Inc., Laurel, MD (USA), October, 1987, No. SAND–86–7176. http://www.osti.gov/scitech/biblio/6725640.
JOHNSON V E, CHAHINE G L, LINDENMUTH W T, et al. The development of structured cavitating jet for deep hole bits[C]//SPE Annual Technical Conference and Exhibition, New Orleans, Louisiana, USA, September 26–29, 1982: 1–8.
CHAHINE G L, GENOUX P F, JOHNSON V E, et al. Analytical and experimental study of the acoustics and the flow field characteristics of cavitating self-resonating water jets[R/OL]. Sandia National Laboratories, Albuquerque, NM, USA, 1984, No. SAND–84–7142. http://www.osti.gov/scitech/biblio/6152414.
JOHNSON V E, CHAHINE G L, LINDENMUTH W T, et al. Cavitating and structured jets for mechanical bits to increase drilling rate, part 1: theory and concepts[J]. Journal of Energy Resources Technology, 1984, 106(2): 282–288.
WANG Pinghui, MA Fei. Vibration analysis experiment of self-resonating cavitating water jet[J]. Journal of Mechanical Engineering, 2009, 45(10): 89–95. (in Chinese)
YI Can, LI Gensheng, ZHANG Dingguo. Laboratory and field study of enhancing cavitation effect with self-resonating nozzle under ambient pressure[J]. Journal of Mechanical Engineering, 2005, 41(6): 218–223. (in Chinese)
LI Gensheng, SHEN Zhonghou, ZHOU Changshan, et al. Investigation and application of self-resonating cavitating water jet in petroleum engineering[J]. Petroleum Science and Technology, 2005, 23(1): 1–15.
LI Gensheng, SHEN Zhonghou, ZHOU Changshan, et al. Development and field tests of self-resonating cavitating water jet nozzle for oilwell drilling[J]. Petroleum Drilling Techniques, 2003, 31(5): 11–12.
LI G, SHI H, LIAO H, et al. Hydraulic pulsed cavitating jet-assisted drilling[J]. Petroleum Science and Technology, 2009, 27(2): 197–207.
JOHNSON V E, LINDENMUTH W T, CONN A F, et al. Feasibility study of tuned-resonator, pulsating cavitating water jet for deep-hole drilling[R/OL]. Sandia National Labs., Albuquerque, NM, USA; Hydronautics, Inc., Laurel, MD, USA, 1981, No. SAND–81–7126. http://www.osti.gov/scitech/servlets/purl/6266875.
KALUMUCK, K M, CHAHINE G L. The use of cavitating jets to oxidize organic compounds in water[J]. Journal of Fluids Engineering, 2000, 122(3): 465–470.
LI Deng, LI Xiaohong, KANG Yong, et al. Experimental investigation on the influence of internal surface roughness of organ-pipe nozzle on the characteristics of high speed jet[J]. Journal of Mechanical Engineering, 2015, 51(17): 169–176. (in Chinese)
FANG Zhenlong, KANG Yong, WANG Xiaochuan, et al. Numerical and experimental investigation on flow field characteristics of organ pipe nozzle[C]//In IOP Conference Series: Earth and Environmental Science, Quebec, Canada, September 22–26, 2014, 22(5): 052020.
HU Dong, LI Xiaohong, TANG, Chuanlin, et al. Analytical and experimental investigations of the pulsed air-water jet[J]. Journal of Fluids and Structures, 2015, 54: 88–102.
DAVIES P. Flow-acoustic coupling in ducts[J]. Journal of Sound and Vibration, 1981, 77(2): 191–209.
BENSON R S, GARG R D, WOODS W A. Unsteady flow in pipes with gradual or sudden area changes[C]//Proceedings of the Institution of Mechanical Engineers, SAGE Publication, 1963, 178(9): 1–23.
LI Gensheng, SHEN Zhonghou. Theory and applications of self-resonating cavitating water jet[M]. China University of Petroleum Press, 2008. (in Chinese)
SOYAMA H, YANAUCHI Y, SATO K, et al. High-speed observation of ultrahigh-speed submerged water jets[J]. Experimental Thermal and Fluid Science, 1996, 12: 411–416.
SOYAMA H. Effect of nozzle geometry on a standard cavitation erosion test using a cavitating jet[J]. Wear, 2013, 297(1): 895–902.
MOMMA T, LICHTAROWICZ A. A study of pressures and erosion produced by collapsing cavitation[J]. Wear, 1995, 186: 425–436.
SOYAMA H. High-speed observation of a cavitating jet in air[J]. Journal of Fluids Engineering, 2005, 127(6): 1095–1101.
LIAO Zhengfang, LI Jun, CHEN Deshu, et al. Theory and experimental study of the self-excited oscillation pulsed jet nozzle[J]. Chinese Journal of Mechanical Engineering, 2003, 16(4): 379–383.
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Supported by National Key Basic Research Program of China(973 Program, Grant No. 2014CB239203), National Natural Science Foundation of China(Grant No. 51474158), and China Scholarship Council(Grant No. 201406270047)
LI Deng, born in 1987, is currently a PhD candidate at School of Power and Mechanical Engineering, Wuhan University, China. He is now studying as a joint-PhD candidate at Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, USA. He received his bachelor degree from Wuhan University, China, in 2012. His research interests include self-excited oscillation pulsed waterjet and cavitating waterjet.
KANG Yong, born in 1978, is currently a professor at School of Power and Mechanical Engineering, Wuhan University, China. He received his bachelor and PhD degrees from Chongqing University, China, in 2001 and 2006. His research interests include waterjet theory and new waterjet technology.
DING Xiaolong, born in 1990, is currently a PhD candidate at School of Power and Mechanical Engineering, Wuhan University, China. His research interests include high speed waterjet peening and new waterjet technology.
WANG Xiaochuan, born in 1983, is currently an associate professor at School of Power and Mechanical Engineering, Wuhan University, China. His research interest is waterjet technology and its applications in mining engineering.
FANG Zhenlong, born in 1989, is currently a PhD candidate at School of Power and Mechanical Engineering, Wuhan University, China. His research interest is high speed self-excited oscillation waterjet.
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Li, D., Kang, Y., Ding, X. et al. Effects of area discontinuity at nozzle inlet on the characteristics of self-resonating cavitating waterjet. Chin. J. Mech. Eng. 29, 813–824 (2016). https://doi.org/10.3901/CJME.2016.0426.060
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DOI: https://doi.org/10.3901/CJME.2016.0426.060