Propulsive performance and flow field characteristics of a 2-D flexible fin with variations in the location of its pitching axis  

不同纵摇轴位置下的二维柔性鳍推进性能与流场特性研究(英文)

作　　者：王志东[1] 丛文超[1] 张晓庆[2] 

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江2120032 [2]挪威船级社,上海200336

出　　处：《Journal of Marine Science and Application》2009年第4期298-304,共7页船舶与海洋工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No.50879031

摘　　要：The thrust coefficients and propulsive efficiency of a two-dimensional flexible fin with heaving and pitching motion were computed using FLUENT. The effect of different locations of the pitching axis on propulsive performance was examined using three deflexion modes which are respectively, modified Bose mode, cantilever beam with uniformly distributed load and cantilever beam with non-uniformly distributed load. The results show that maximum thrust can be achieved with the pitching axis at the trailing edge, but the highest propulsive efficiency can be achieved with the pitching axis either 1/3 of the chord length from the leading edge in modified Bose mode, or 2/3 of the chord length from the leading edge in cantilever beam mode. At the same time, the effects of the Strouhal number and maximal attack angle on the hydrodynamics performance of the flexible fin were analyzed. Parameter interval of the maximum thrust coefficient and the highest propulsive efficiency were gained. If the Strouhal number is low, high propulsive efficiency can be achieved at low αmax , and vice versa.

关 键 词：flexible fin pitching axis Strouhal number maximal attack angle propulsive performance 

分 类 号：U664.7[交通运输工程—船舶及航道工程]