Ship Resistance and Wake Optimization of JBC Considering Hull-Propeller Interaction Based on CFD

摘要

Optimization design of hull based on the computational fluid dynamics(CFD) is widely used in simulation-based design (SBD). And with thelimit of computer ability, complex hull optimization such as hullappended with an actual propeller have not launched a full investigation.In this paper, we conduct design optimization of Japan Bulk Carrier(JBC) with an actual propeller (AP) based on CFD considering shipresistance and propeller wake distortion. In-house software OPTShip-SJTU is used for the present hull form optimization. Firstly, hull formmodification module is applied to change the stern shape of the JBC.The in-house hydrodynamic CFD software naoe-FOAM-SJTU isapplied to calculate the hull resistance and AP wake distortion. And thedynamic overset grid method is used to achieve the interaction betweenhull and propeller so that the optimization can take the high-fidelityflow interaction into consideration. The results demonstrate that theOPTShip-SJTU solver can be extended to optimize the coupledhydrodynamic performance in hull form optimization. The optimizationresults indicate a V-shaped hull can suppress the flow separationaround the stern and benefit the propeller wake distortion. At the sametime, the results remind us that it is necessary to consider the resistanceand wake distortion together in hull optimization studies.