International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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Effect of waterjet intake plane shape on course-keeping stability of a planing boat

  • Park, Kyurin (Korea Research Institute of Ships and Ocean Engineering) ;
  • Kim, Dong Jin (Korea Research Institute of Ships and Ocean Engineering) ;
  • Kim, Sun Young (Korea Research Institute of Ships and Ocean Engineering) ;
  • Seo, Jeonghwa (Department of Naval Architecture and Ocean Engineering, Chungnam National University) ;
  • Suh, Innduk (Department of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Rhee, Shin Hyung (Department of Naval Architecture and Ocean Engineering, Seoul National University)
  • Received : 2021.01.05
  • Accepted : 2021.06.28
  • Published : 2021.11.30
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Abstract

The course-keeping stability of a high speed planing boat should be considered at the design stage for its safe operations. The shape of waterjet intake plane is one of important design parameters of a waterjet propelled planing boat. That has significant influences on the stern flow patterns and pressure distributions. In this study, the effects of the waterjet intake shapes of planing boats on the course-keeping stabilities are investigated. Two kinds of designed planing boats have the same dimensions, but there are differences in waterjet intake plane shapes. Captive and free-running model tests, Computational Fluid Dynamics (CFD) analyses are carried out in order to estimate their hydrodynamic performances including course-keeping stabilities. The results show that the flat and wide waterjet intake plane of the initially designed boat makes the course-keeping stability worse. The waterjet intake shape is redesigned to improve the course-keeping stability. The improved performances are confirmed by free-running model tests and full-scale trials.

Keywords

Acknowledgement

This study was supported in part by the Promotion of Innovative Business for Regulation-Free Special Zones funded by the Ministry of SMEs and Startups (MSS, Korea) (P0012448, "Demonstration of Unmanned Surface Vehicle for a Maritime Survey").

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