静水中长鳍扭波推进的水动力数值研究  

Numerical study for the hydrodynamics of torsional wave propulsion with long fin in stationary water

作　　者：白亚强[1,2] 张军[1,2] 丁恩宝 翟树成[1,2] 

机构地区：[1]中国船舶科学研究中心船舶振动噪声重点实验室,江苏无锡214082 [2]江苏省绿色船舶技术重点实验室,江苏无锡214082

出　　处：《水动力学研究与进展（A辑）》2016年第4期402-408,共7页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金(51379193);江苏省自然科学基金(BK2012536)~~

摘　　要：长鳍扭波推进是一种典型的鱼类游动方式,具有高效、低噪、机动灵活等一系列优点。该文以"尼罗河魔鬼"鱼为仿生研究对象,采用弹性光顺法和局部网格重划法的动网格技术对大摆幅的长鳍扭波推进运动流场进行了数值计算研究,鳍条最大摆幅高达85°,对长鳍扭波推进在系泊状态下的水动力进行了研究,并与试验结果进行了比较验证。数值分析了鳍面压力分布及其随相位的变化,以及与推力产生的关联,并分析了长鳍扭波推力随扭波频率的变化,研究表明,系泊状态下,推力系数不随频率而改变。The swimming manners of fishes have the features of high efficiency and low noise, which is of important inspiration to people on the research of propulsion. The Gymnarchus Niloticus Fish（GNF） swimming by a long dorsal-fin generally cruises with high efficiency and extra-ordinal maneuverability while keeping its body for the straight line. To adapt to the fin＇s large deforming, the dynamic grid technique including spring-based smoothing model and local grid remeshing model is used to calculate the dynamics of torsional wave propulsion in stationary water. The maximum swing amplitude of the ray on the fin calculated in this paper reaches 85°, and the numerical results is compared with experiments and validated. The pressure distribution around the fin and its variation with phase, and its relationship with thrust production are analyzed. The thrust variation with wave frequency is analyzed which indicates that the thrust coefficient does not vary with fin wave frequency.

关 键 词：仿生推进 扭波推进 柔性长鳍 数值计算 

分 类 号：O352[理学—流体力学]