Water Science and Engineering 2020, 13(2) 145-153 DOI:   https://doi.org/10.1016/j.wse.2020.06.004  ISSN: 1674-2370 CN: 32-1785/TV

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Keywords
Cavitating flow
Circular multi-orifice plate
PIV technique
High-speed photography
Turbulence characteristics
Authors
PubMed

PIV analysis and high-speed photographic observation of cavitating flow field behind circular multi-orifice plates

Zhi-ping Guo a, b, Xi-huan Sun a, Zhi-yong Dong c, *

a College of Hydro-Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
b Department of Transportation Engineering, Shanxi Conservancy Technical Institute, Yuncheng 044004, China
c College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China

Abstract

Based on a self-developed hydrodynamic cavitation device with different geometric parameters for circular multi-orifice plates, turbulence characteristics of cavitating flow behind multi-orifice plates, including effects of orifice number and orifice layout on longitudinal velocity, turbulence intensity, and Reynolds stress, were measured with the particle image velocimetry (PIV) technique. Flow regimes of the cavitating flow were also observed with high-speed photography. The experimental results showed the following: (1) high-velocity multiple cavitating jets occurred behind the multi-orifice plates, and the cavitating flow fields were characterized by topological structures; (2) the longitudinal velocity at each cross-section exhibited a sawtooth-like distribution close to the multi-orifice plate, and each sawtooth indicated one jet issuing from one orifice; (3) there were similar magnitudes and forms for the longitudinal and vertical turbulence intensities at the same cross-section; (4) the variation in amplitude of Reynolds stress increased with an increase in orifice number; and (5) the cavitation clouds in the flow fields became denser with the increase in orifice number, and the clouds generated by the staggered layout of orifices were greater in number than those generated by the checkerboard-type one for the same orifice number. The experimental results can be used to analyze the mechanism of killing pathogenic microorganisms through hydrodynamic cavitation.

Keywords Cavitating flow   Circular multi-orifice plate   PIV technique   High-speed photography   Turbulence characteristics  
Received 2019-07-04 Revised 2020-02-14 Online: 2020-06-30 
DOI: https://doi.org/10.1016/j.wse.2020.06.004
Fund:

This work was supported by the National Natural Science Foundation of China (Grant No. 51479177).

Corresponding Authors: Zhi-yong Dong
Email: dongzy@zjut.edu.cn
About author:

References:

Arrojo, S., Benito, Y., Tarifa, A.M., 2008. A parametrical study of disinfection with hydrodynamic cavitation. Ultrasonics Sonochmistry. 15(5), 903-908. https://doi.org/10.1016/j.ultsonch.2007.11.001.

Assis, M.P., Filho, J.G.D., Genovez, A.I.B., 2013. Bacteria inactivation by means of cavitation blasting equipment in freshwater systems. In: Proceedings of the 35th IAHR World Congress. Tsinghua University Press, Beijing, p. 79.

Bing, B., Dong, Z.Y., Chang, Z.Q., Yang, L., Han, W., 2013. Experimental study on degradation of p-nitrophenol by hydrodynamic cavitation due to square orifices plates. In: Proceedings of the 35th IAHR World Congress. Tsinghua University Press, Beijing, p. 99.

Chakinala, A.G., Gogate, P.R., Burgess, A.E., Bremner, D.H., 2008. Treatment of industrial waste water effluents using hydrodynamic cavitation and the advanced Fenton process. Ultrasonics Sonochemistry. 15(1), 49-54. https://doi.org/10.1016/j.ultsonch.2007.01.003.

Chen, L., Dong, Z.Y., Liu, C., Zhang, X., 2016. Experimental study on disinfection of Escherichia coli by hydrodynamic cavitation behind square multi-orifice plates. Journal of Hydroelectric Engineering. 35(9), 48-54 (in Chinese). https://doi.org/10.11660/slfdxb.20160906.

Dong, Z.Y., Hu, J.J., 2013. Effects of circular orifices plates with Venturi tube on degradation of hydrophilic and hydrophobic pollutants. Applied Mechanics and Materials. 409-410, 294-297. https://doi.org/10.4028/www.scientific.net/amm.409-410.294.

Dong, Z.Y., Yang, Y.G., Chen, Q.Q., Shi, B., 2013a. A study of hydraulic characteristics of multi-square-hole orifice plates. Applied Mechanics and Materials. 256-259, 2470-2473. https://doi.org/10.4028/www.scientific.net/amm.256-259.2470.

Dong, Z.Y., Chen, Q.Q., Yang, Y.G., Shi, B., 2013b. Experimental and numerical study of hydrodynamic cavitation of orifice plates with multiple triangular holes. Applied Mechanics and Materials. 256-259, 2519-2522. https://doi.org/ 10.4028/www.scientific.net/AMM.256-259.2519 .

Dong, Z.Y., Zhang, Z., 2015. Effects of triangular multi-orifice plates with Venturi tube on degradation of hydrophilic and hydrophobic mixing pollutants. In: Proceedings of the 36th IAHR World Congress. IAHR, Hague, pp.1051-1055.

Dong, Z.Y., Xiao, Q., 2016. Effects of hydrodynamic caviatation due to square orifices plates with Venturi tube on degradation of hydrophilic and hydrophobic mixture. In: Proceedings of the 20th IAHR-APD Congress. The Open University of Sri Lanka, Colombo, p.80.

Dong, Z.Y., Qin, Z.Y., 2018. Experimental study of pathogenic microorganisms inactivated by Venturi-type hydrodynamic cavitation with different throat lengths. Journal of the Civil Engineering Forum. 4(3), 209-214. https://doi.org/10.22146/jcef.38756.

Dong, Z.Y., Zhao, W.Q., 2018a. Killing rate of colony count by hydrodynamic cavitation due to square multi-orifice plates. Earth and Environmental Science. 121, 1-7. https://doi.org/10.1088/1755-1315/121/2/022004.

Dong, Z.Y., Zhao, W.Q., 2018b. PIV analysis of cavitating flow field behind square multi-orifice plates. EPiC Series in Engineering. 3, 615-625. https://doi.org/10.29007/fhdg.

Dong, Z.Y., Zhang, S.H., Yang, J., Li, D.Q., Liu, W.J., 2019. A study on pathogenic microorganisms in raw water killed by hydrodynamic cavitation due to combined device of square multi-orifice plate with Venturi tube. Journal of Zhejiang University of Technology. 47(3), 268-272 (in Chinese). https://doi.org/10.3969/j.issn.1006-4303.2019.03.006.

Gao, X.P., Song, Q.L., Sun, B.W., Song, H.F., 2019. PIV experimental study on the flow characteristics upstream of a floating intake in nonlinear stratified ambient conditions. Environmental Fluid Mechanics. 19(6), 1005–1024.   https://doi.org/10.1007/s10652-019-09698-6.

Geng, K., Dong, Z.Y., Zhang, K., Ju, W.J., Zhao, W.Q., Li, Y.R., Qin, Z.Y., Wang, L., 2017. Experimental study of Escherichia coli killed by hydrodynamic cavitation due to Venturi tube. China Environmental Science. 37(9), 3385-3391 (in Chinese). https://doi.org/10.3969/j.issn.1000-6923.2017.09.023.

Joyce, E., Phull, S.S., Mason, T.J., 2003. The development and evaluation of ultrasound for the treatment of bacterial suspension: A study of frequency, power and sonication time on cultured Bacillus species. Ultrasonics Sonochemistry, 10(6), 315-318. https://doi.org/10.1016/s1350-4177(03)00101-9. 

Jyoti, K.K., Pandit, A.B., 2004. Effect of cavitation on chemical disinfection efficiency. Water Research 38(9), 2249-2258. https://doi.org/10.1016/j.watres.2004.02.012.

Li, D.Q., Dong, Z.Y., Yang, J., Zhang, S.H., Liu, W.Q., 2019. Experiment on pathogenic microorganisms in raw water killed by a combined hydrodynamic cavitation device. Advances in Science and Technology of Water Resources. 39(3), 33-37 (in Chinese). https://doi.org/10.3880/j.issn.1006-7647.2019.03.006.

Liu, C., Dong, Z.Y., Chen, L., Zhang, X., 2016. Experimental study of Escherichia coli killed by hydrodynamic cavitation due to circular multi-orifice plates. China Environmental Science. 36(8), 2364-2370 (in Chinese). https://doi.org/10.3969/j.issn.1000-6923.2016.08.016.

Liu, W.J., Dong, Z.Y., Yang, J., Li, D.Q., Zhang, S.H., 2018. Killing pathogenic microorganism by hydrodynamic cavitation due to triangular multi-orifice plates. China Environmental Science, 38(8), 3011-3017 (in Chinese). https://doi.org/10.3969/j.issn.1000-6923.2018.08.029.

Sawant, S.S., Anil, A.C., Krishnamurthy, V., Gaonkar, C., Kolwalkar, J., Khandeparker, L., Desai, D., Mahulkar, A.V., Ranade, V.V., Pandit, A.B., 2008. Effect of hydrodynamic cavitation on zooplankton: A tool for disinfection. Biochemical Engineering Journal. 42(3), 320-328. https://doi.org/10.1016/j.bej.2008.08.001.

Sivakumar, M., Pandit, A.B., 2002. Wastewater treatment: A novel energy efficient hydrodynamic cavitational technique. Ultrasonics Sonochemistry. 9(3), 123-131. https://doi.org/10.1016/s1350-4177(01)00122-5.

Wang, L., Dong, Z.Y., Qin, Z.Y., Geng, K., Zhang, K., 2017. Experimental study of pathogenic microorganism in raw water disinfected by hydrodynamic cavitation in variable diffusion angle Venturi tubes. Journal of Hydroelectric Engineering. 36(9), 75-81 (in Chinese). https://doi.org/10.11660/slfdxb.20170908.

Yang, J., Dong, Z.Y., Liu, W.J., Li, D.Q., Zhang, S.H., 2018. Killing pathogenic microorganism in raw water by hydrodynamic cavitation due to a combination of orifice plates and Venturi tubes. China Environmental Science. 38(10), 3755-3760 (in Chinese). https://doi.org/10.3969/j.issn.1000-6923.2018.10.019.

Zhang, K., Dong, Z.Y., Yao, R.H., 2018. Pressure characteristics of hydrodynamic cavitation reactor due to the combination of Venturi tubes with multi-orifice plates. Journal of Hydrodynamics. 30(3), 514-521. https://doi.org/10.1007/s42241-018-0056-z.

Zhang, X., Dong, Z.Y., Chen, L., Liu, C., 2016. Experimental study on Escherichia coli killed by hydrodynamic cavitation behind triangular multi-orifice plates. Journal of Hydroelectric Engineering. 35(8), 65-71 (in Chinese). https://doi.org/10.11660/slfdxb.20160808.

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