Numerical prediction method of shafting power characteristics of free self-propelled ship in waves

Table 1. Parameter setting of CFD simulation cases
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Table 1. Parameter setting of CFD simulation cases
仿真工况编号波长λ/L_pp 波高A/L_pp 推进模型
1 静水静水 w/o
2 0.65 0.0108
3 0.85 0.0142
4 1.15 0.0192
5 1.95 0.0325
6 0.65 0.0108 MOUM
7 0.85 0.0142
8 1.15 0.0192
9 1.95 0.0325

Table 2. Uncertainty analysis results under different grids and time steps
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Table 2. Uncertainty analysis results under different grids and time steps
r_G 结果 (U_G / D) /% r_T 结果 (U_T / D) /%
S_G1 S_G2 S_G3 S_T1 S_T2 S_T3
CT $ \sqrt 2$ 10.542 11.811 11.999 4.04 2 10.552 11.811 11.914 0.29
TF3 0.922 0.935 0.938 1.12 0.920 0.935 0.942 1.42
TF5 1.136 1.111 1.107 0.95 1.131 1.111 1.103 1.20

Table 3. Validation results based on test data
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Table 3. Validation results based on test data
(U_G / D) /% (U_T / D) /% (U_SN / D) /% (U_D / D) /% (U_V / D) /% (E / D) /%
C_T 4.04 0.29 4.33 8 9.10 8.94
TF₃ 1.12 1.42 2.54 4 4.74 0.37
TF₅ 0.95 1.20 2.15 4 4.54 0.65

Table 4. Simulation results of added resistance and self-propulsion in waves
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Table 4. Simulation results of added resistance and self-propulsion in waves
λ/L_pp ΔR/N Q/(N·m) n/（r·s⁻¹）
静水 0 2.049 12.021
0.651 2.129 2.325 12.754
0.851 10.8 2.41 13.092
1.15 45.556 3.474 15.227
1.951 15.905 2.555 13.475

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Jiawei YU, Chaobang YAO, Zhiguo ZHANG, Dakui FENG, Xianzhou WANG. Numerical prediction method of shafting power characteristics of free self-propelled ship in waves[J]. Chinese Journal of Ship Research, 2022, 17(3): 119

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