Numerical Prediction of Hydrodynamic Performance of Planing Trimaran with a Wave-Piercing Bow
| Autor: | Yumin Su, Hailong Shen, Su Guangsheng |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Total resistance
planing trimaran 020101 civil engineering Ocean Engineering 02 engineering and technology Computer Science::Computational Geometry DFBI six-degree-of-freedom model 01 natural sciences Trim 010305 fluids & plasmas 0201 civil engineering Physics::Fluid Dynamics lcsh:Oceanography symbols.namesake lcsh:VM1-989 Hull 0103 physical sciences Froude number lcsh:GC1-1581 Water Science and Technology Civil and Structural Engineering Computer simulation Numerical analysis lcsh:Naval architecture. Shipbuilding. Marine engineering Drag Free surface numerical simulation symbols Geology Marine engineering |
| Zdroj: | Journal of Marine Science and Engineering Volume 8 Issue 11 Journal of Marine Science and Engineering, Vol 8, Iss 897, p 897 (2020) |
| ISSN: | 2077-1312 |
| DOI: | 10.3390/jmse8110897 |
| Popis: | The central hull is the most important structure in the planing trimaran. In order to gain insight into the relationship between hydrodynamic performance and main hull shape, experimental tests and numerical simulations were carried out for volume Froude Number (Fr&Delta ) ranging from 1.31 to 4.98. Dynamic sinkage and trim in the Dynamic Fluid Body Interaction (DFBI) six-degree-of-freedom model were considered. A validation study carried out by comparison of experimental test results with numerical results showed good consistency. To analyze the process of tunnel penetration and pressure change at the bottom of the boat, numerical simulation results for free surface, bottom streamline, and pressure distribution around the hull are given. A large triangular high-pressure area was observed in the front of the main hull for all volume Froude numbers. Consequently, the central drainage body, in reference to the profile of single planing craft with distinctive resistance performance, was redesigned into a wave-piercing shape. Total resistance, sinkage, and trim angle of the new model were then predicted by numerical method. The results show that the central drainage body has a significant impact on the hydrodynamic performance of the planing trimaran. Furthermore, the wave-piercing shaped main hull has a drag reduction effect. |
| Databáze: | OpenAIRE |
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