A method for predicting propeller performance considering ship motion in regular waves

Eom, Myeong-Jin; Paik, Kwang-Jun; Jang, Yoonho; Ha, Ji-Yeon; Park, Dong-Woo

doi:10.1016/j.oceaneng.2021.109135

Cited by 9 publications

(5 citation statements)

References 9 publications

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“…Using the thrust coefficient from the literature [9] as the baseline, it can be observed from Figure 21 that as the water depth increases, the deviation between the thrust coefficient and the experimental values also increases. Since this result is consistent with the trends observed in the literature [13,14], it is reasonable to infer the water pressure of the propeller during the open water testing using Bernoulli's law. Finally, based on the experimental values of the self-propulsion test in [8], the VOF method was used to calculate the impact of the free surface plane on the performance of the underwater vehicle at a model scale.…”

Section: Propeller Performance Analysis Of the Free Surface Effectsupporting

confidence: 89%

“…The shear stress transport (SST) k-ω turbulence model, proposed by Menter [6] and combined with the FVM, was extensively utilized in research [7][8][9]. To more accurately calculate the influence of the free surface, Hirt and Nichols [10] introduced the volume of fluid method (VOF), which was subsequently widely adopted by researchers [11][12][13][14]. This method became the primary computational technique for analyzing two-phase flow, particularly involving free surfaces.…”

Section: Introductionmentioning

confidence: 99%

“…This study further confirmed that these characteristics depend on depth, model size, and advance ratio. Subsequently, Eom et al [13,14] pointed out that under a fixed advance ratio, thrust and water depth exhibit a linear relationship. Furthermore, Cianferra and Armenio [15] conducted a dimensional analysis.…”

Section: Introductionmentioning

confidence: 99%

“…Finally, the VOF method was used to investigate the propeller's performance in the presence of a free surface. As a result, we were able to establish a formula that relates thrust to water depth [13,14]. In recent years, some scholars [21][22][23] used acoustics to predict the radiated noise of marine propellers.…”

Section: Introductionmentioning

confidence: 99%

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Acoustic Field Radiation Prediction and Verification of Underwater Vehicles under a Free Surface

Chen,

Pan,

Lin

et al. 2023

JMSE

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This study aimed to examine the acoustic field radiated by propellers and underwater vehicles. For the verification of sound radiation in underwater vehicles, numerical methods are widely used in addition to experiments and propeller blade frequencies for calculation and validation. Numerical convergence and accuracy are more important for near-field and far-field problems. This paper uses the boundary element method (BEM) to assess the convergence of the finite volume method (FVM). In this study, the FVM, including the Reynolds-averaged Navier–Stokes method and the Ffowcs Williams–Hawkings (FW-H) acoustic model, is used to investigate the influence of various geometric inflows on the hydrodynamic and noise performance of the propeller. Then, the sound radiation of the FVM is compared with the BEM at the far field to determine the number of meshed elements. Furthermore, spectral analysis is being conducted to examine the noise generated by the underwater vehicle and propeller. The objective is to investigate the influence of the free surface on propeller efficiency. After verifying the numerical simulation, the results indicate that a relationship can be established between water pressure and propeller thrust under specific conditions. This relationship can be used to estimate the magnitude of propeller thrust at different water depths. The simulated results of propeller thrust, torque coefficient, propulsion efficiency, and sound radiation in this study are consistent with experimental values. This demonstrates the accuracy and practicality of the findings of numerical procedures in engineering applications.

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Section: Propeller Performance Analysis Of the Free Surface Effectsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Acoustic Field Radiation Prediction and Verification of Underwater Vehicles under a Free Surface

Chen,

Pan,

Lin

et al. 2023

JMSE

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“…The wave height of the corresponding frequency can be obtained using Equation (16). Under the assumption of deep-water conditions, the wave number can be calculated as Equation (17), and the corresponding wavelength frequency can be calculated in the spectrum as Equation (18). In addition, to superimpose regular waves, it is necessary to select the range and interval of the frequency to be used.…”

Section: S( Fmentioning

confidence: 99%

A Numerical Study on the Performance of the 66k DWT Bulk Carrier in Regular and Irregular Waves

Kim,

Hwang,

Lee

et al. 2023

JMSE

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Accurate resistance performance evaluation is essential to predict the minimum propulsion horsepower required for ships in real sea. Therefore, in this paper, the added resistance performance of K-Supramax in various wave conditions was calculated using CFD (Computational Fluid Dynamics). First, to compare the resistance performance according to the DOF (Degree of Freedom), the added resistance performance in the head regular wave was investigated and compared with the experiment. The 2DOF and 6DOF results in the head regular wave had no significant differences. Second, to compare the resistance performance among various wave conditions, the effect of the heading angle was analyzed by comparing resistance and motion RAOs (Response Amplitude Operators) in bow quartering sea conditions using 6DOF. The added resistance showed the highest value near the resonance frequency of 170°. As the heading angle increased, the added resistance tended to decrease, regardless of the wavelength ratio. Also, the added resistance performance in irregular waves was investigated with reference to the adverse conditions. The spectral method, which linearly superimposes regular wave results, and the added resistance generated during irregular waves directly through CFD were compared. The resistance in irregular waves increased by approximately 92% for the spectral method and by approximately 72% for the direct irregular wave calculation compared to the resistance in calm water. In addition, the PSD (Power Spectral Density) of resistance and the distribution of motion RAOs obtained from direct irregular wave calculations were investigated.

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Effect of contra-rotating propeller boss cap fins (CRPBCF) on the performance of marine propellers

et al. 2022

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A method for predicting propeller performance considering ship motion in regular waves

Cited by 9 publications

References 9 publications

Acoustic Field Radiation Prediction and Verification of Underwater Vehicles under a Free Surface

Acoustic Field Radiation Prediction and Verification of Underwater Vehicles under a Free Surface

A Numerical Study on the Performance of the 66k DWT Bulk Carrier in Regular and Irregular Waves

Effect of contra-rotating propeller boss cap fins (CRPBCF) on the performance of marine propellers

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