Unsteady loading on the propeller at different maneuvering conditions using hybrid and urans methods
| Autor: | Abbas, Nawar, Kornev, Nikolai |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| Popis: | The results of computations of the unsteady wake and unsteady loadings on marine propellers behind the KVLCC2 tanker model under simple manoeuver conditions (only drift angle) and complete manoeuvring (drift angle and yaw rate) using different numerical methods are presented and analysed. The hybrid URANS-LES model presented in [1, 2], the hybrid IDDES and the k-ω-SST model are applied first for the bare hull at different drift angles, and then under complete manoeuvring conditions (different drift angles and yaw rates). The forces and moment coefficients of the bare hull calculations under different drift angels were compared with the experimental results of Kume et al. [3]. In the second series of calculations the arrangement containing both the ship and rotating propeller is computed with consideration of all interaction effects at different drift angles. Under complete manoeuvring condition the whole system (ship, rudder and propeller) was calculated using the hybrid method [1, 2]. CFD results for the time averaged thrust were compared with the experimental results [4]. Also the comparison for the standard deviations of forces and moments acting on propeller and its appendages with the experimental estimations is presented. |
| Databáze: | OpenAIRE |
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