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Combined experimental and computational investigation of the cavitating flow in an orifice plate with special emphasis on surrogate-based optimization method

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Abstract

We investigated the influence of geometrical parameters of the orifice plate on the cavitation structures, and optimized these parameters by using a surrogate-based model with special emphasis on the concentration of hydroxyl radical released. The results show that for the orifice plate of the hydrodynamic cavitation system, the possible location of the inception of the cavity spreads to throat and divergent section of the venturi geometry. Based on the surrogate model and global sensitivity assessment, the diameter of throat D t and diameter of inlet D in significantly influenced the size of the cavity, while the length of throat L t had little effect on both cavitation intensity and flow rate. It should be noted that when L t is decreased, the size of cavity would be slightly decreased but the flow rate increased clearly. The increase of the diverging section is in favor of the size of cavity. By comparing the experimental measurements on the concentration of Methylene blue, the optimum geometry of the orifice plate for best cavitational activity is proposed.

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Correspondence to Biao Huang.

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Recommended by Associate Editor Shin Hyung Rhee

Xianlin Li received his B.S. in Vehicle Engineering from Beijing Forestry University, China, in 2014. He is a graduate student in Mechanical Engineering, Beijing Institute of Technology, majoring in fluid dynamics. His research interests include hydrodynamic cavitation and hydraulic machinery.

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Li, X., Huang, B., Chen, T. et al. Combined experimental and computational investigation of the cavitating flow in an orifice plate with special emphasis on surrogate-based optimization method. J Mech Sci Technol 31, 269–279 (2017). https://doi.org/10.1007/s12206-016-1229-8

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  • DOI: https://doi.org/10.1007/s12206-016-1229-8

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