A research of the DP thruster analysis with various duct shapes for the model test

Abstract

The Korea Research Institute of Ships and Ocean Engineering (KRISO) is developing a high performance DP thruster for extreme environmental conditions such as the ice DP model test for the Arctic condition. The DP thruster performance analysis was carried out as the first stage of the development. The Commercial RANS solver was used to perform the analysis including the Bollard Pull(BP) test and the Propeller Open Water(POW) test. In the performance analysis, the three duct shapes were used; which are no. 19A-mod, no. 19A and no. 37. The no. 19A-mod duct in clockwise rotation condition and the no. 37 duct in counter clockwise rotation condition were given the best performance result, respectively. However, according to the results of two directions of rotation, the no. 19A duct showed the reasonable performance. As the result, the no. 19A duct was chosen for the model test. For the validation, the BP model test was performed for the no. 19A duct. In the further work, the research on the propeller design as well as the influence by the duct shape will be continuously developed. ？ 2019 by the International Society of Offshore and Polar Engineers (ISOPE).