Nalazite se na CroRIS probnoj okolini. Ovdje evidentirani podaci neće biti pohranjeni u Informacijskom sustavu znanosti RH. Ako je ovo greška, CroRIS produkcijskoj okolini moguće je pristupi putem poveznice www.croris.hr
izvor podataka: crosbi !

Prediction of Local and Integral Self-Propulsion Flow Characteristics Using Dynamic Overset Grid Method (CROSBI ID 726730)

Prilog sa skupa u zborniku | prošireni sažetak izlaganja sa skupa

Đurasević, Sanijo ; Gatin, Inno ; Jasak, Hrvoje Prediction of Local and Integral Self-Propulsion Flow Characteristics Using Dynamic Overset Grid Method. 2022. str. 22-26

Podaci o odgovornosti

Đurasević, Sanijo ; Gatin, Inno ; Jasak, Hrvoje

engleski

Prediction of Local and Integral Self-Propulsion Flow Characteristics Using Dynamic Overset Grid Method

Propulsion characteristics obtained from the model-scale experiments can be extrapolated to full-scale to be used in ship design. Due to different Reynolds (Re) numbers in model and full- scale, it is questionable if propulsion characteristics obtained with extrapolation procedure are adequate to be used in full-scale. Computational Fluid Dynamics (CFD) models based on Reynolds-Averaged Navier-Stokes (RANS) (Jasak, 1996) equations are being used more frequently to describe the ship-propeller interaction (Yilmaz et al., 2020) and to predict the self-propulsion characteristics (Guo et al., 2020). To perform this type of calculations substantial computational resources and a complete set of solver capabilities are necessary, which became possible only recently. This type of high- fidelity calculations can provide insight into local and integral flow phenomena necessary for adequate ship design. Regulations regarding energy efficiency design index of new ships (EEDI), and energy efficiency of existing ships (EEXI) also increase demand for high-fidelity CFD calculations in naval hydrodynamics. Accurate prediction of the self-propulsion characteristics requires adequate modelling of the propeller. A fully-discretized rotating propeller (Castro, Carrica and Stern, 2011) and potential flow-based methods coupled with the RANS solvers (Villa et al., 2019) are probably the most frequently used approaches. Potential flow-based methods are convenient due to it’s efficiency, while a fully discretized rotating propeller method represents the most accurate approach but at the same time less efficient. This work presents a methodology for the prediction of propulsion characteristics with the use of the actuator disc and fully- discretized propeller methods.

Self-propulsion ; Discretized propeller ; Actuator disc ; Overset Grid ; Level Set

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o prilogu

22-26.

2022.

objavljeno

Podaci o matičnoj publikaciji

Podaci o skupu

24th Numerical Towing Tank Symposium (NuTTS '22)

predavanje

16.10.2022-18.10.2022

Zagreb, Hrvatska

Povezanost rada

Brodogradnja