Hydrodynamic performance of small unmanned catamaran based on STAR-CCM+

参数	数值
船长L/m	1.184
单片体宽B/m	0.225
型深H/m	0.169
片体间距d/m	0.680
平均吃水T/m	0.070
初始纵倾角度$ {\theta _0} $/(°)	1.679
单片体湿表面积S/m2	0.303
单片体排水体积$\nabla$/m3	0.012
推进器直径D/m	0.094

Table 2. Different grid foundation sizes
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Table 2. Different grid foundation sizes
网格基础尺寸h/m 网格数量
0.060 620 467
0.058 698 329
0.052 883 026
0.048 1 119 250
0.040 1 806 127
0.035 2 681 102
0.030 4 122 151
0.024 7 860 054

Table 3. GCI convergence analysis of model total resistance

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Table 3. GCI convergence analysis of model total resistance

网格基础尺寸h/m	网格阻力收敛平均值$ f(R) $/N	网格加密比r	网格收敛误差$ \alpha (R) $	网格收敛指数$ GCI(R) $/%
0.060	8.333	1.034	−0.003	5.361
0.058	8.357	1.115	−0.019	10.064
0.052	8.519	1.092	0.009	5.929
0.048	8.442	1.190	−0.019	5.776
0.040	8.601	1.143	−0.010	4.270
0.035	8.690	1.167	−0.008	2.675
0.030	8.756	1.261	0.006	1.319
0.024	8.702	—	—	—

Table 4. The Fr numbers and Re numbers corresponding to different speeds
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Table 4. The Fr numbers and Re numbers corresponding to different speeds
Fr Re U/(m∙s⁻¹)
0.672 1.329×10⁶ 1.0
1.344 2.658×10⁶ 2.0
2.016 3.987×10⁶ 3.0
2.822 830.4×10⁶ 4.2

Table 5. Comparison of the total resistance between the double hull and twice the single hull at different Fr numbers
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Table 5. Comparison of the total resistance between the double hull and twice the single hull at different Fr numbers
Fr U/(m∙s⁻¹) 2倍单片体总阻力R₁/N 双片体总阻力R₂/N 相对误差/%
0.672 1.0 3.161 3.161 0.011
1.344 2.0 30.161 31.182 3.384
2.016 3.0 34.759 34.306 −1.304
2.822 4.2 71.373 73.358 2.782

Table 6. Comparison of the wave amplitudes of free surface at 0.05L from stern on midship longitudinal section for double hull and single hull at different Fr numbers
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Table 6. Comparison of the wave amplitudes of free surface at 0.05L from stern on midship longitudinal section for double hull and single hull at different Fr numbers
Fr 单片体波幅/m 双片体波幅/m 相对误差/%
0.672 0.005 0.006 8.854
1.344 0.014 0.015 4.246
2.016 0.077 0.085 9.501
2.822 0.179 0.175 −2.413

Table 7. Comparison of average friction coefficient of the hull surface for double hull and single hull at different Fr numbers
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Table 7. Comparison of average friction coefficient of the hull surface for double hull and single hull at different Fr numbers
Fr 单片体表面平均摩擦系数双片体表面平均摩擦系数相对误差/%
0.672 1.964 2.020 2.827
1.344 7.092 7.102 0.143
2.016 16.527 16.694 1.011
2.822 8.613 8.839 2.626

Table 8. Comparison of propeller experimental and simulated values of unmanned catamaran during self-propelled state at different propulsion speeds
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Table 8. Comparison of propeller experimental and simulated values of unmanned catamaran during self-propelled state at different propulsion speeds
推进器转速n/(r∙min⁻¹) 推力试验值/N 推力仿真值/N 相对误差/%
1 000 3.605 3.957 9.753
2 000 16.187 15.827 2.221
3 000 38.998 36.220 7.124

Table 9. Comparison of total resistance between self-propelled and hydrostatic states of unmanned catamaran at different equilibrium point speeds
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Table 9. Comparison of total resistance between self-propelled and hydrostatic states of unmanned catamaran at different equilibrium point speeds
推进器转速n/(r∙min⁻¹) 平衡点航速U_e/(m∙s⁻¹) 自航阻力R_T/N 静水阻力R₂/N 相对误差/%
1 000 1.168 7.914 7.669 3.188
2 000 1.998 31.654 29.499 7.307
3 000 3.943 72.439 59.818 21.099

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Yuting CHEN, Shihua XU, Jiahao SHI, Xu LIU, Guoxiang HOU. Hydrodynamic performance of small unmanned catamaran based on STAR-CCM+[J]. Chinese Journal of Ship Research, 2023, 18(5): 73

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Paper Information

Category: Ship Design and Performance

Received: May. 27, 2022

Accepted: --

Published Online: Mar. 21, 2025

The Author Email:

DOI:10.19693/j.issn.1673-3185.02936

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Principal dimensions of unmanned catamaran

Table 1. Principal dimensions of unmanned catamaran

Table 2. Different grid foundation sizes

Table 2. Different grid foundation sizes

Table 3. GCI convergence analysis of model total resistance

Table 3. GCI convergence analysis of model total resistance

Table 4. The Fr numbers and Re numbers corresponding to different speeds

Table 4. The Fr numbers and Re numbers corresponding to different speeds

Table 5. Comparison of the total resistance between the double hull and twice the single hull at different Fr numbers

Table 5. Comparison of the total resistance between the double hull and twice the single hull at different Fr numbers

Table 6. Comparison of the wave amplitudes of free surface at 0.05L from stern on midship longitudinal section for double hull and single hull at different Fr numbers

Table 6. Comparison of the wave amplitudes of free surface at 0.05L from stern on midship longitudinal section for double hull and single hull at different Fr numbers

Table 7. Comparison of average friction coefficient of the hull surface for double hull and single hull at different Fr numbers

Table 7. Comparison of average friction coefficient of the hull surface for double hull and single hull at different Fr numbers

Table 8. Comparison of propeller experimental and simulated values of unmanned catamaran during self-propelled state at different propulsion speeds

Table 8. Comparison of propeller experimental and simulated values of unmanned catamaran during self-propelled state at different propulsion speeds

Table 9. Comparison of total resistance between self-propelled and hydrostatic states of unmanned catamaran at different equilibrium point speeds

Table 9. Comparison of total resistance between self-propelled and hydrostatic states of unmanned catamaran at different equilibrium point speeds