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contributor authorZhang, Lei
contributor authorZhang, Jianing
contributor authorShang, Yuchen
date accessioned2022-02-04T14:27:40Z
date available2022-02-04T14:27:40Z
date copyright2020/02/06/
date issued2020
identifier issn0892-7219
identifier otheromae_142_2_021203.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4273698
description abstractTo research the stern flap (SF) and waterjet–hull interaction, unsteady Reynolds-averaged Navier–Stokes (URANS) simulations for a waterjet-propelled trimaran considering sinkage and trim are performed. Uncertainty analysis of the numerical results for the bare hull (BH) model is presented. At the design speed Froude number (Fr) of 0.6 and under displacement state, the model-scaled trimaran, installed with stern flaps of varied angle and length, tests the BH and self-propulsion (SP) performance based on URANS simulations. For the resistance, the global effects due to motions and the local effects of SF, waterjets (WJ), and the coupled term between SF and WJ on the hull are separately analyzed. Taking the waterjet propulsion system into account, an SP model with reasonable stern flap effectively reduces the trim, the resistance acting on the hull and the waterjet thrust deduction which contributes to energy-saving and high-efficiency propulsion. The mechanism of the improved performance of the waterjet-propelled trimaran with stern flaps is discussed. For the resistance increment, the global effects, the local effects of SF and WJ are the major reason for resistance increase, and the nonlinear coupled term of local effects contributes to the resistance reduction most. In addition, the different resistance components of frictional, hydrostatic, and hydrodynamic are separately researched, which shows that the pressure resistance components plays a leading role in the total resistance reduction in the SP model with the suitable SF.
publisherThe American Society of Mechanical Engineers (ASME)
titleStern Flap–Waterjet–Hull Interactions and Mechanism: A Case of Waterjet-Propelled Trimaran With Stern Flap
typeJournal Paper
journal volume142
journal issue2
journal titleJournal of Offshore Mechanics and Arctic Engineering
identifier doi10.1115/1.4045498
page21203
treeJournal of Offshore Mechanics and Arctic Engineering:;2020:;volume( 142 ):;issue: 002
contenttypeFulltext


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