URANS SIMULATION OF A PARTIALLY SUBMERGED PROPELLER OPERATING UNDER THE BOLLARD CONDITION

Brodogradnja

Paik, Kwang-Jun^2¹  Lee, Sungwook^1² 

[1] Department of Naval Architecture and Ocean Engineering, Inha University, Incheon 22212, Republic of Korea^2;Division of Naval Architecture and Ocean Systems Korea Maritime and Ocean University, Busan 49112, Republic of Korea^1

关键词: Propeller;    Free surface;    Partially submerged propeller;    Thrust loss;    Air ventilation;    Bollard condition;   

DOI  :  10.21278/brod69107

学科分类：工程和技术（综合）

来源: Brodarski Institut

【 摘 要 】

The performance of a partially submerged propeller under the bollard condition was assessed using numerical simulations based on URANS. The simulations were performed with varying propeller rotating speed and submergence depth. The propeller rotating speed was varied from 2 rps to 8 rps with the interval of 2 rps at the submergence depths of h/R=0.0,0.5, and 1.0. Here, h is the submergence depth from the free surface to the propeller shaft center and R is the radius of the propeller. The thrust and torque losses were compared with the thrust and torque in the deep water condition. The thrust and torque decreased rapidly with increasing propeller rotating speed. The thrust and torque ratios were compared with the empirical formula showing generally good agreement. The hydrodynamic characteristics around the partially submerged propeller were investigated using numerical simulations.

【 授权许可】

CC BY