Journal of Shanghai Jiaotong University ›› 2020, Vol. 54 ›› Issue (1): 1-9.doi: 10.16183/j.cnki.jsjtu.2020.01.001

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Research and Application of the Capture Area Obtaining Method for Waterjet

GUO Jun 1,3,CHEN Zuogang 1,2 3,DAI Yuanxing 4,5,CHEN Jianping 4,5   

  1. 1. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; 2. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai 200240, China; 3. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; 4. Marine Design and Research Institute of China, Shanghai 200011, China; 5. Science and Technology on Water-Jet Propulsion Laboratory, Shanghai 200011, China
  • Online:2020-01-28 Published:2020-01-16

Abstract: The momentum flux method recommended by the International Towing Tank Conference (ITTC) needs to determine the capture area of waterjet. A simple and practical method to obtain the capture area based on streamline method is proposed. MATLAB is adopted to greatly simplify the post-processing of obtaining the capture area and enhances the efficiency. On this basis, by solving the RANS equation and applying the steady multi-reference frame (MRF) model, the performance of the waterjet is numerical calculated and analyzed at different rotational speeds. It is found that the method can accurately get the shape of the capture area, and the parametric expressions of the capture area are given. The shape of the capture area, the velocity distribution of the pump intake and the position of the separation point of the lip flow all change with the rotational speed. The proposed method is practical and can be used to predict the performance of the waterjet.

Key words: waterjet; capture area; streamline; computational fluid dynamics (CFD); numerical calculation; multi-reference frame (MRF)

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