Journal
OCEAN ENGINEERING
Volume 249, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.oceaneng.2022.110950
Keywords
CFD; Body force method; Ducted propeller; Ducted virtual disk; Ship self-propulsion
Funding
- National Natural Science Foundation of China [51609189]
- Fundamental Research Funds for the Central Universities [2015IVA029]
- CD-Adapco, China Ship Development and Design Center, Key Laboratory of High Perfor-mance Ship Technology (Wuhan University of Technology) [20151g0006]
- High Technology Ship Scientific Research Project of Ministry of Industry and Information Technology of China
- project of Wuhan University of Technology Start Up Found for Talented Researchers
Ask authors/readers for more resources
In this study, a modified body force method applicable for ducted propellers is investigated. The accuracy of this method is compared with other methods through uncertainty analysis and self-propulsion simulations. The results show that the modified body force method can effectively describe wake fields and accurately reflect the interaction between the ship and the ducted propeller.
For ships with conventional propellers, the body force method is one of the main methods for self-propulsion research due to its high computational efficiency. However, when it comes to ducted propellers with complex internal flow fields, applicability of the body force method is still unknown. In this work, a modified body force method which can be applied to the ducted propeller is investigated. Specifically, the Reynolds-averaged Navier-Stokes (RANS) solver is adopted to simulate the interaction between a trawler and a ducted propeller. Before self-propulsion simulations, uncertainty analysis of ship resistance, ducted propeller thrust, and ducted propeller torque was carried out. As a comparison, the discretized propeller method and the body force methods are adopted in the simulations of self-propulsion. Because of the neglect of the duct, the errors of the conventional body force method exceed the allowable range. Therefore, the concept of the ducted virtual disk is proposed, in which only the propeller is replaced by the virtual disk. Especially, the advance speed coefficient and the open water curve of the virtual disk are modified, so that the open water result of the ducted virtual disk is consistent with that of the ducted propeller. The modified body force method has good accuracy and can roughly describe the wake fields when applied to self-propulsion simulation. Furthermore, the interaction between the ship and the ducted propeller can be well reflected, which is of great significance in rapidly predicting self propulsion of ships with ducted propellers.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available