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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- 作者：Xianlin Li ; Biao Huang ; Tairan Chen…
- 关键词：CFD ; Hydrodynamic cavitation ; Optimization ; Orifice plate
- 刊名：Journal of Mechanical Science and Technology
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：31
- 期：1
- 页码：269-279
- 全文大小：
- 刊物类别：Engineering
- 刊物主题：Mechanical Engineering; Vibration, Dynamical Systems, Control; Industrial and Production Engineering;
- 出版者：Korean Society of Steel Construction
- ISSN：1976-3824
- 卷排序：31
文摘
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 Dt and diameter of inlet Din significantly influenced the size of the cavity, while the length of throat Lt had little effect on both cavitation intensity and flow rate. It should be noted that when Lt 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.