Effect of the Biomimetic Spine-Covered Protrusions (BSCPs) Height and Arrangement on SUBOFF Bare Hull Model Drag
Effect of the Biomimetic Spine-Covered Protrusions (BSCPs) Height and Arrangement on SUBOFF Bare Hull Model Drag
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DOI：
10.1007/s13369-022-07027-6
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发表时间：
2022-07
影响因子：
2.9
通讯作者：
Jin-Yan Shi;Honggen Zhou;Xiaoming Feng;Guizhong Tian;Zhongxu Lian
中科院分区：
文献类型：
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作者：
Jin-Yan Shi;Honggen Zhou;Xiaoming Feng;Guizhong Tian;Zhongxu Lian
本研究的主要目的是研究受河豚刺启发的仿生棘包突结构（BSCPs）对小型自主水下航行器（auv）船体阻力的影响。八种不同高度（0.3-1毫米，间隔0.1毫米）和两种排列（平均和交错排列）的BSCPs应用于零俯俯角和偏航角的裸潜艇船体（SUBOFF），并介绍了一个普通船体进行比较。采用CFD-RANS方法模拟了雷诺数为1.4 × 106时的船体流动。阻力测试结果表明，交错阵列的减阻性能最佳，当BSCPs高度为0.3 mm时，最大减阻率为9.47%。虽然BSCPs增加了船体压力阻力，但减少的粘性阻力更大。表面摩擦系数反映出BSCPs船体剪应力显著低于普通船体。反向涡阻止了低速流体的喷射，阻碍了高速流体的扫掠，有效地减少了壁面附近雷诺数应力的产生。剪切和雷诺应力的共同减小导致粘滞阻力减小。发展在下游的边界层具有较强的抗分离能力。此外，bscp抑制涡度运动，从而阻止湍流爆发，降低湍流强度。未来的活动可能涉及将优化的BSCPs结构参数应用于不同的auv船体。
The main aim of this work is to investigate the effect of the biomimetic spine-covered protrusions structure (BSCPs) inspired by pufferfish spines on the small autonomous underwater vehicles (AUVs) hull drag. The BSCPs with eight different heights (0.3–1 mm, 0.1 mm interval) and two arrangements (average and staggered arrays) are applied to a bare submarine hull (SUBOFF) at zero angle of pitch and yaw, and a plain hull is introduced for comparison. CFD-RANS method is used to simulate flow over the hull at a Reynolds number of 1.4 × 106. The drag results show that the staggered arrays have the optimal drag reduction performance, with a maximum drag reduction of 9.47% for the BSCPs height of 0.3 mm. Although the hull pressure drag with BSCPs increases, the reduction in viscous drag is superior. Skin-friction coefficient reflects significantly lower BSCPs hull shear stress than plain hull. The reverse vortex prevents the ejection of low-velocity fluids and impedes sweeping of high-velocity fluids, effectively reducing the generation of Reynolds stresses near the wall. The combined reduction in shear and Reynolds stress leads to viscous drag decrease. The boundary layer developing downstream of the small-scale BSCPs has the more strong anti-separation ability. Furthermore, the BSCPs inhibit the vorticity motion, thereby hinders turbulent outbursts and reduces turbulence intensity. Future activities may involve the application of optimized BSCPs structure parameters on different AUVs hulls.