中国物理B ›› 2017, Vol. 26 ›› Issue (5): 54701-054701.doi: 10.1088/1674-1056/26/5/054701
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
Experimental investigation on underwater drag reduction using partial cavitation
Bao Wang(王宝), Jiadao Wang(汪家道), Darong Chen(陈大融), Na Sun(孙娜), Tao Wang(王涛)
- 1 State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China;
2 School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China;
3 Science Technology on Vehicle Transmission Laboratory, China North Vehicle Research Institute, Beijing 100161, China
Experimental investigation on underwater drag reduction using partial cavitation
Bao Wang(王宝)1, Jiadao Wang(汪家道)1, Darong Chen(陈大融)1, Na Sun(孙娜)1,2, Tao Wang(王涛)1,3
- 1 State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China;
2 School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China;
3 Science Technology on Vehicle Transmission Laboratory, China North Vehicle Research Institute, Beijing 100161, China
摘要：
For underwater drag reduction, one promising idea is to form a continuous gas or discrete bubbly layer at the submerged surface. Owing to the lower viscosity of gas than of water, this could considerably reduce underwater drag by achieving slippage at the liquid-gas interface. This paper presents an experimental investigation on underwater drag reduction using partial cavitation. Dense hydrophobic micro-grooved structures sustain gas in the valleys, which can be considered as defects that weaken the strength of the water body. Therefore, partial cavities are easily formed at lower flow speeds, and the dense cavities connect to form a lubricating gas layer at the solid-liquid interface. The results indicate that the proposed method achieves drag reduction without any additional energy or gas-providing devices, which should stimulate the development of underwater vehicles.
中图分类号: (Drag reduction)
- 47.85.lb