Journal of Bionic Engineering ›› 2025, Vol. 22 ›› Issue (5): 2539-2549.doi: 10.1007/s42235-025-00736-2
Additive Manufactured, Bioinspired Stainless Steel Surface for Robust Drag Reduction
Zhen Lin1; Peng Xu1; Junfei Huang2; Jinhong Zhang4; Xiaolong Zhang1; Lijun Li1; Yurong Zhang3; Ruteng Wang1; Xinping Long1; Yifeng Lei1; Changhui Song2; Daobing Chen3; Longjian Xue1,3
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1 School of Power and Mechanical Engineering, WuhanUniversity, Wuhan 430072, China
2 School of Mechanical & Automotive Engineering, SouthChina University of Technology, Guangzhou 510640, China
3 The Institute of Technological Science, Wuhan University,Wuhan 430072, China
4 Department of Mechanical Engineering, Shanxi PolytechnicCollege, Taiyuan 030006, China
Additive Manufactured, Bioinspired Stainless Steel Surface for Robust Drag Reduction
Zhen Lin1; Peng Xu1; Junfei Huang2; Jinhong Zhang4; Xiaolong Zhang1; Lijun Li1; Yurong Zhang3; Ruteng Wang1; Xinping Long1; Yifeng Lei1; Changhui Song2; Daobing Chen3; Longjian Xue1,3
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1 School of Power and Mechanical Engineering, WuhanUniversity, Wuhan 430072, China
2 School of Mechanical & Automotive Engineering, SouthChina University of Technology, Guangzhou 510640, China
3 The Institute of Technological Science, Wuhan University,Wuhan 430072, China
4 Department of Mechanical Engineering, Shanxi PolytechnicCollege, Taiyuan 030006, China
摘要： Bioinspired superhydrophobic surfaces have been used for drag reduction. However, the secondary structures and the air cushions on these surfaces could be destructed in a flow, losing the effect of drag reduction. Here, a stainless-steel surface with mushroom-like cross-section (SMC) and diamond cavities (SMCD) having a drag reduction rate up to 19.37% is developed by 3D printing. The concealed re-entrant structures in SMCD prevent the infiltration of water into the chamber and form gas cushions, which converts the sliding friction at liquid-solid interface into rolling friction at liquid-gas interface, realizing the drag reduction. Meanwhile, 98.3% of air can be maintained in the chamber in a flow with Reynolds number (Re) of 9?×?105, ensuring the drag reduction in a high-velocity flow. Moreover, the continuous top stainless-steel surface and the supporting mesh network protect the critical re-entrant structures, ensuring the robustness of SMC. With the bioinspired design and one-step additive manufacturing process, SMC holds great potential for large-area production and applications requiring robust drag reduction.