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Drag reduction of turbulent boundary layer over sawtooth riblet surface with superhydrophobic coat
The Physics of Fluids, 2023The application of drag reduction tech holds great significance to energy saving. To achieve better drag reduction, we investigated the flow characteristics of the turbulent boundary layer (TBL) over a composite surface made of sawtooth riblets with ...
Jinge Hu, Zhaohui Yao
semanticscholar +1 more source
Investigation of drag reduction mechanism for blunt bodies with plasma spikes
The Physics of Fluids, 2023The two main problems in hypersonic vehicles are wave drag and aerodynamic heating. This work proposes a novel method for drag reduction by combining spikes with the plasma synthetic jet actuator (PSJA).
Weilin Zhang +4 more
semanticscholar +1 more source
IEEE transactions on industrial electronics (1982. Print), 2023
The improvement of sailing speed and endurance of microunderwater vehicle can be achieved by reducing the wall friction drag. We proposed a piezoelectric drag reducer (PDR), which can be embedded into the wall of the underwater vehicle without affecting ...
Lu Zhang, X. Shan, ShengAng Yan, T. Xie
semanticscholar +1 more source
The improvement of sailing speed and endurance of microunderwater vehicle can be achieved by reducing the wall friction drag. We proposed a piezoelectric drag reducer (PDR), which can be embedded into the wall of the underwater vehicle without affecting ...
Lu Zhang, X. Shan, ShengAng Yan, T. Xie
semanticscholar +1 more source
Surface Modification of 3D Biomimetic Shark Denticle Structures for Drag Reduction
Advances in MaterialsShark skin features superhydrophilic and riblet‐textured denticles that provide drag reduction, antifouling, and mechanical protection. The artificial riblet structures exhibit drag reduction capabilities in turbulent flow.
Kang Yang +10 more
semanticscholar +1 more source
Hydrophobicity induced drag reduction: Perspectives from the slip length
Journal of Applied Physics, 2023Hydrophobicity has been developed in many areas, whose potentials in drag reduction at microscale have attracted numerous attentions for expanding the practical applications in fields of on chip devices, materials synthesis, and enhanced heat transfer ...
Zhi Tao +6 more
semanticscholar +1 more source
Pyramid-Shaped Superhydrophobic Surfaces for Underwater Drag Reduction
ACS Applied Materials & InterfacesSuperhydrophobic surfaces hold immense potential in underwater drag reduction. However, as the Reynolds number increases, the drag reduction rate decreases, and it may even lead to a drag increase. The reason lies in the collapse of the air mattress.
Huiling Duan, Hongyuan Li, Pengyu Lv
exaly +2 more sources
Ultrafast Self-Healing Superhydrophobic Surface for Underwater Drag Reduction.
Langmuir, 2022The self-healing superhydrophobic surfaces have attracted great interest owing to restoring superhydrophobicity without preparation crafts. However, the self-healing superhydrophobic surface still faces the dilemma of long repairing time.
Pengfei Sun +4 more
semanticscholar +1 more source
Drag reduction performance of grooved superhydrophobic surfaces
The Physics of FluidsIn the field of engineering applications, reducing frictional drag in turbulent flows is imperative to enhance energy efficiency. This study investigates the potential of grooved superhydrophobic surfaces (GSHS) in reducing drag in turbulent flows under ...
Haoran Ma +6 more
semanticscholar +1 more source
The Physics of Fluids
Fluid drag greatly lowers the efficiency and increases the energy consumption of underwater vehicles and devices working in similar environments. Therefore, drag reduction has become a major topic in fluids research.
Zhiyi Yuan +7 more
semanticscholar +1 more source
Fluid drag greatly lowers the efficiency and increases the energy consumption of underwater vehicles and devices working in similar environments. Therefore, drag reduction has become a major topic in fluids research.
Zhiyi Yuan +7 more
semanticscholar +1 more source
High drag reduction by spontaneous capture and transportation of bubbles.
NanoscaleGas lubrication is globally recognized as an effective technology for reducing drag. However, the injected gas bubbles are prone to escape, resulting in a low gas coverage area and insufficient drag reduction efficiency.
Junyi Lin +5 more
semanticscholar +1 more source