Hydrodynamic Characteristics and Speed Performance of a Full Spade and a Twisted Rudder

최정은,; 김정훈,; 이홍기,; 박동우,

doi:10.3744/snak.2010.47.2.163

Cited by 9 publications

(2 citation statements)

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“…Shen et al [32] proposed a rudder design method to improve rudder cavitation performance and tested a twisted rudder in a large cavitation channel concerning rudder surface cavitation and cavitation inception speed. Kim et al [33] and Choi et al [34] developed twisted full-spade rudders based on incoming flow angles for a large container ship to recover the swirl energy for the propeller slipstream. Kim et al [35] designed three twisted rudders for a large container carrier and verified the speed performances of the ship improved by those twisted rudders through model tests in a towing.…”

Section: Introductionmentioning

confidence: 99%

The Prediction of the Performance of a Twisted Rudder

Park

Paik²,

Ahn³

et al. 2021

Applied Sciences

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A new design approach using the concept of a twisted rudder to improve rudder performances has been proposed in the current paper. A correction step was introduced to obtain the accurate inflow angles induced by the propeller. Three twisted rudders were designed with different twist angle distributions and were tested both numerically and experimentally to estimate their hydrodynamic characteristics at a relatively high ship speed. The improvement in the twisted rudders compared to a reference flat rudder was assessed in terms of total cavitation amount, drag and lift forces, and moment for each twin rudder. The total amount of surface cavitation on the final optimized twin twisted rudder at a reference design rudder angle decreased by 43% and 34.4% in the experiment and numerical prediction, respectively. The total drag force slightly increased at zero rudder angle than that for the twin flat rudder but decreased at rudder angles higher than 4° and 6° in the experiment and numerical simulation, respectively. In the experimental measurements, the final designed twin twisted rudder gained a 5.5% increase in the total lift force and a 37% decrease in the maximum rudder moment. Regarding these two performances, the numerical results corresponded to an increase of 3% and a decrease of 66.5%, respectively. In final, the present numerical and experimental results of the estimation of the twisted rudder performances showed a good agreement with each other.

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Section: Introductionmentioning

confidence: 99%

The Prediction of the Performance of a Twisted Rudder

Park

Paik²,

Ahn³

et al. 2021

Applied Sciences

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“…Kim, et al (2009) introduced a method for design of a full-spade twisted rudder section, by using a genetic algorithm based on the Vortex Lattice Method. Choi, Kim, Lee and Park (2010) reported the superiority of a twisted rudder to a full spade rudder with the respect to the speed and the cavitation performance by using numerical and experimental research. This paper demonstrates the characteristics of the X-Twisted rudder, which was developed in Hyundai Heavy Industries to overcome the cavitation problems of large container carriers in the way of the leading edge also considering manufacturing productivity (Chang, Choi, Son and Ahn, 2012).…”

Section: Introductionmentioning

confidence: 99%