Experimental and Numerical Study of Penguin Mode Flapping Foil Propulsion System for Ships  

作　　者：Naga Praveen Babu Mannam Parameswaran Krishnankutty Harikrishnan Vijayakumaran Richards Chizhuthanickel Sunny 

机构地区：[1]Ocean Engineering, Indian Institute of Technology Madras, Chennai 600036, India [2]Texas A&M University, College Station, TX 77840, USA

出　　处：《Journal of Bionic Engineering》2017年第4期770-780,共11页仿生工程学报（英文版）

摘　　要：The use of biomimetic tandem flapping foils for ships and underwater vehicles is considered as a unique and interesting concept in the area of marine propulsion. The flapping wings can be used as a thrust producing, stabilizer and control devices which has both propulsion and maneuvering applications for marine vehicles. In the present study, the hydrodynamic per- formance of a pair of flexible flapping foils resembling penguin flippers is studied. A ship model of 3 m in length is fitted with a pair of counter flapping foils at its bottom mid-ship region. Model tests are carried out in a towing tank to estimate the propulsive performance of flapping foils in bollard and self propulsion modes. The same tests are performed in a numerical environment using a Computational Fluid Dynamics （CFD） software. The numerical and experimental results show reasonably good agreement in both bollard pull and self propulsion trials. The numerical studies are carried out on flexible flapping hydrofoil in unsteady conditions using moving unstructured grids. The efficiency and force coefficients of the flexible flapping foils are determined and presented as a function of Strouhal number.The use of biomimetic tandem flapping foils for ships and underwater vehicles is considered as a unique and interesting concept in the area of marine propulsion. The flapping wings can be used as a thrust producing, stabilizer and control devices which has both propulsion and maneuvering applications for marine vehicles. In the present study, the hydrodynamic per- formance of a pair of flexible flapping foils resembling penguin flippers is studied. A ship model of 3 m in length is fitted with a pair of counter flapping foils at its bottom mid-ship region. Model tests are carried out in a towing tank to estimate the propulsive performance of flapping foils in bollard and self propulsion modes. The same tests are performed in a numerical environment using a Computational Fluid Dynamics （CFD） software. The numerical and experimental results show reasonably good agreement in both bollard pull and self propulsion trials. The numerical studies are carried out on flexible flapping hydrofoil in unsteady conditions using moving unstructured grids. The efficiency and force coefficients of the flexible flapping foils are determined and presented as a function of Strouhal number.

关 键 词：biomimetic propulsion flapping foil penguin locomotion Strouhal number tandem arrangement thrust coefficient 

分 类 号：U664.121[交通运输工程—船舶及航道工程] V211.1[交通运输工程—船舶与海洋工程]