An experimental assessment of resistance reduction and wake modification of a KVLCC model by using outer-layer vertical blades
| Autor: | Ho-Hwan Chun, Inwon Lee, Nam Hyun An, Sang Hoon Ryu |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Engineering
Outer-layer vertical blades lcsh:Ocean engineering Flow (psychology) Axial velocity Ocean Engineering Energy efficient ship Skin frictional drag reduction Outer-layervertical blades Effective power Turbulent boundary layer Wake lcsh:VM1-989 lcsh:TC1501-1800 Tur-bulent boundary layer Towing business.industry lcsh:Naval architecture. Shipbuilding. Marine engineering Boundary layer Control and Systems Engineering Drag business Reduction (mathematics) Layer (electronics) Marine engineering |
| Zdroj: | INTERNATIONAL JOURNAL OF NAVAL ARCHITECTURE AND OCEAN ENGINEERING(6): 1 International Journal of Naval Architecture and Ocean Engineering, Vol 6, Iss 1, Pp 151-161 (2014) |
| ISSN: | 2092-6782 |
| DOI: | 10.2478/ijnaoe-2013-0169 |
| Popis: | In this study, an experimental investigation has been made of the applicability of outer-layer vertical blades to real ship model. After first devised by Hutchins and Choi (2003), the outer-layer vertical blades demonstrated its effectiveness in reducing total drag Plat plate (Park et al., 2011) with maximum drag reduction of 9.6%. With a view to assessing the effect in the flow around a ship, the arrays of outer-layer vertical blades have been installed onto the side bottom and flat bottom of a 300k KVLCC model. A series of towing tank test has been carried out to investigate resistance (C-TM) reduction efficiency and improvement of stern wake distribution with varying geometric parameters of the blades array. The installation of vertical blades led to the C-TM reduction of 2.15 similar to 2.76% near the service speed The nominal wake fraction was affected marginally by the blades array and the axial velocity distribution tended to be more uniform by the blades array. |
| Databáze: | OpenAIRE |
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