Bibliographic Details
| Title: |
Application of virtual disk propulsion model for self-propelled surface ship in regular head wave. |
| Authors: |
Yu, Jiawei1 (AUTHOR), Yao, Chaobang1 (AUTHOR) yaochaobang@hust.edu.cn, Liu, Liwei1 (AUTHOR), Feng, Dakui1 (AUTHOR), Wang, Xianzhou1 (AUTHOR) |
| Source: |
Journal of Marine Science & Technology. Jun2023, Vol. 28 Issue 2, p471-495. 25p. |
| Subject Terms: |
*HEAD waves, *COMPUTATIONAL fluid dynamics, *WATER waves, *SAILING ships, *SHIPS, *MOTION |
| Geographic Terms: |
TOKYO (Japan) |
| Company/Entity: |
OSAKA University |
| Abstract: |
The advanced numerical methods with new model and scheme, to reduce the requirements of the computation times and computer resources for seakeeping predictions, are urgent according to the International Towing Tank Conference seakeeping committee. In the present study, different propulsion models are used to implement the seakeeping performance simulations of a self-propelled surface ship sailing in waves. Both the accuracy and the computational cost are investigated. Four different propulsion models for self-propelled surface ship simulation including the discretized propeller model, the descriptive body-force method, the Osaka University method and the modified Osaka University method were studied. Uncertainty analyses are conducted separately for hull, propeller in calm water and ship motions in waves. Numerical simulations in calm water and waves are carried out to obtain the ship attitudes, resistance, motion responses and added resistance. Self-propulsion simulations in calm water and waves are performed to obtain the propeller rotation speed, the ship motions and the speed loss. Four wavelengths ( λ / L pp = 0.65 , 0.85 , 1.15 , 1.95 ) of regular head waves with a wave steepness of 1/60 are considered according to the benchmark case of the Tokyo 2015 Computational Fluid Dynamics Workshop. The self-propulsion simulation results of the thrust, torque, ship motions and speed loss using different propulsion models have been compared to each other. It can be found that all the differences of speed loss are less than 2% and these of heave and pitch amplitudes are less than 6.13%. The modified Osaka University method, which provides numerical results closest to those of the discretized propeller model, is an alternative method for ship self-propulsion simulations in waves. [ABSTRACT FROM AUTHOR] |
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| Database: |
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