Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Development and CFD Analysis of a New Type Pre-Swirl Duct for 176k Bulk Carrier

176k Bulk Carrier에 대한 신개념 타입의 Pre-Swirl Duct의 개발 및 CFD 해석

  • Yoo, Gwang Yeol (Department of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Kim, Moon Chan (Department of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Shin, Yong Jin (Department of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Shin, Irok (Department of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Kim, Hyun Woong (Department of Naval Architecture & Ocean Engineering, Pusan National University)
  • 유광열 (부산대학교 조선해양공학과) ;
  • 김문찬 (부산대학교 조선해양공학과) ;
  • 신용진 (부산대학교 조선해양공학과) ;
  • 신이록 (부산대학교 조선해양공학과) ;
  • 김현웅 (부산대학교 조선해양공학과)
  • Received : 2018.12.04
  • Accepted : 2019.03.29
  • Published : 2019.08.20
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Abstract

This paper shows numerical results for the estimation of the propulsor efficiency of Pre-Swirl Duct for 176k bulk carrier as well as its design method. Reynolds averaged Navier-Stokes equations have been solved and the k-epsilon model applied for the turbulent closure. The propeller rotating motion is determined using a sliding mesh technique. The design process is divided into each part of Pre-Swirl Duct, duct and Pre-Swirl Stator. The design of duct was performed first because it is located further upstream than Pre-Swirl Stator. The distribution of velocity through the duct was analyzed and applied for the design of Pre-Swirl Stator. The design variables of duct include duct angle, diameter, and chord length. Diameter, chord length, equivalent angle are considered when designing the Pre-Swirl Stator. Furthermore, a variable pitch angle stator is applied for the final model of Pre-Swirl Duct. The largest reduction rate of the delivered power in model scale is 7.6%. Streamlines, axial and tangential velocities under the condition that the Pre-Swirl Duct is installed were reviewed to verify its performance.

Keywords

References

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