结合Savitsky方法和重叠网格技术的滑行艇阻力数值计算与分析

郭军; 扈喆; 朱子文; 陈作钢; 崔连正; 李贵斌

doi:10.19693/j.issn.1673-3185.02417

结合Savitsky方法和重叠网格技术的滑行艇阻力数值计算与分析

doi: 10.19693/j.issn.1673-3185.02417

郭军^1,,
扈喆^1,,
朱子文^1,,
陈作钢^{2, 3, ,},
崔连正^{2, 3},
李贵斌⁴

1.
集美大学轮机工程学院，福建厦门 361021
2.
上海交通大学海洋工程国家重点实验室，上海 200240
3.
上海交通大学船舶海洋与建筑工程学院，上海 200240
4.
中国船舶及海洋工程设计研究院喷水推进技术重点实验室，上海 200011

基金项目: 福建省中青年教师教育科研项目(JAT200243，JAT190333)；福建省自然科学基金资助项目（2021J05163）

详细信息

作者简介:
郭军，男，1992年生，博士，副教授。研究方向：船舶计算流体力学。E-mail：guojun6049@163.com

扈喆，男，1988年生，博士，教授。研究方向：船舶与海洋结构物研发与应用。E-mail：zhehu@jmu.edu.cn

朱子文，男，1991年生，博士，讲师。研究方向：计算流体力学。E-mail：zwzhu@jmu.edu.cn

陈作钢，男，1967年生，博士，研究员。研究方向：船舶计算流体力学，风洞循环水槽研发与应用。E-mail：zgchen@sjtu.edu.cn

通信作者:
陈作钢

中图分类号: U661.31⁺1
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出版历程
- 收稿日期: 2021-06-16
- 修回日期: 2021-09-14
- 网络出版日期: 2022-06-10
- 刊出日期: 2022-06-30

Numerical calculation and analysis of resistance performance of planing craft combining Savitsky method and overset grid technology

GUO Jun^1
,,
HU Zhe^1
,,
ZHU Ziwen^1
,,
CHEN Zuogang^{2, 3
, ,},
CUI Lianzheng^{2, 3},
LI Guibin⁴

1.
School of Marine Engineering, Jimei University, Xiamen 361021, China
2.
State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
3.
School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
4.
Science and Technology on Water Jet Propulsion Laboratory, Marine Design and Research Institute of China, Shanghai 200011, China

结合Savitsky方法和重叠网格技术的滑行艇阻力数值计算与分析由郭军，等创作，采用知识共享署名4.0国际许可协议进行许可。

摘要

摘要: 目的为提高数值预报精度，对滑行艇的静水阻力高精度数值模拟方法进行研究。方法应用计算流体动力学（CFD）方法，结合Savitsky方法和重叠网格技术，对滑行艇在静水中的三维黏性流场进行数值模拟，并对不同载荷系数和航速下滑行艇的流场特性进行分析。结果结果显示，滑行艇的阻力、升沉及纵倾角等计算结果与试验结果吻合良好，艇底的喷溅现象及水气分布模拟正常，表明采用所提方法可以准确、有效地预报滑行艇的阻力性能；随着载荷系数的增加，龙骨线压力系数的峰值增加，压力中心位置逐渐前移；随着航速的增加，龙骨线压力系数的峰值减小，压力中心位置逐渐后移，驻点线与中纵剖面的夹角减小，艇后“空穴”的深度减小、长度增大。结论所做研究可为滑行艇阻力预报提供一种准确、有效的数值计算方法，能为滑行艇水动力性能数值研究提供技术支撑。
- 滑行艇 /
- 阻力 /
- 计算流体动力学 /
- 重叠网格 /
- Savitsky方法
Abstract: Objective In this paper, the hydrostatic resistance of a planing craft is studied using the high-precision numerical simulation method to improve the numerical prediction accuracy. Methods The three-dimensional viscous flow field of a planing craft in calm water is numerically simulated using the computational fluid dynamics (CFD) method combined with the Savitsky method and overset grid technique, and the flow field characteristics of the craft under different load coefficients and speeds are analyzed. Results The calculated results of the resistance, sinkage and trim angle of the planing craft are in good agreement with the experimental results, and the spray phenomenon and distribution of water and air on the bottom of the craft are simulated normally, which shows that this method can accurately and effectively predict the resistance performance of planing craft. With the increase in the load coefficient, the peak value of the pressure coefficient on the keel increases, and the position of the pressure center moves forward. With the increase in speed, the peak value of the pressure coefficient on the keel decreases, the position of the pressure center gradually moves towards the stern, the angle between the stagnation line and the longitudinal section in the center plane decreases, the depth of the cavity behind the transom decreases, and the length of the cavity increases. Conclusions This study provides an accurate and effective numerical calculation method for the resistance prediction of planing craft, and can provide technical support for the numerical study of the hydrodynamic performance of such craft.
- planing craft /
- resistance /
- computational fluid dynamics /
- overset grid /
- Savitsky method

HTML全文

图 1 滑行艇模型

Figure 1. Geometry model of planing craft

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图 2 计算域和边界条件

Figure 2. Computational domain and boundary conditions

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图 3 计算域网格

Figure 3. Grid of computational domain

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图 4 滑行艇的航态估算

Figure 4. Attitude estimation of planing craft

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图 5 升沉计算值与试验值对比

Figure 5. Comparison of heaving between CFD and EFD results

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图 6 纵倾计算值与试验值对比

Figure 6. Comparison of trim between CFD and EFD results

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图 7 阻力计算值与试验值对比

Figure 7. Comparison of resistance between CFD and EFD results

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图 8 平均浸湿长度计算值与试验值对比

Figure 8. Comparison of average wet length between CFD and EFD results

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图 9 不同载荷工况下的压力分布

Figure 9. Pressure distribution at different load conditions

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图 10 不同航速下的压力分布

Figure 10. Pressure distribution at different speeds

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图 11 不同航速下y = 0剖面的自由面波高对比

Figure 11. Wave pattern of y = 0 at different speeds

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图 12 不同航速下的自由波面分布

Figure 12. Free wave surface distribution at different speeds

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图 13 不同航速下的滑行艇表面的水气分布

Figure 13. Volume fraction of water of planing craft at different speeds

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表 1 滑行艇的载荷工况

Table 1. Load conditions of planing craft

工况载荷系数吃水/m 重心纵向位置/m 重心垂向位置/m

1 0.304 0.026 0.400 0.067
2 0.608 0.042 0.457 0.067
3 0.912 0.057 0.457 0.067

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表 2 航态预估对阻力预报的影响

Table 2. Influence of trim estimation on resistance prediction

方法 σ/B θ/(°) C_t L_wet/B

试验结果 (EFD) 0.064 4.15 0.00682 3.41
重叠网格 0.058 3.94 0.00752 3.54
Savitsky+重叠网格 0.060 4.07 0.00725 3.47

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