计算力学学报2024，Vol.41Issue(6)：1037-1044,8.DOI:10.7511/jslx20230613003
振动障碍物型式对摆动尾鳍水动力性能影响研究
Study on the influence of vibration obstacle type on the hydrodynamic performance of flapping caudal fin
摘要
Abstract
Based on computational fluid dynamics(CFD)methods combined with Fluent's dynamic mesh technology,the hydrodynamic performance of a flapping caudal fin in its wake fields generated by different vibration obstacles was studied.The average thrust coefficient,power consumption and propulsion efficiency of the flapping caudal fin were obtained by changing the distance between the leading edge of the caudal fin and the center point of the obstacle(S),the size of the obstacle(d)and the incoming flow velocity(U),and the analysis was conducted based on the pressure distribution contour and vortex contour of the flow field.The calculation results show that the presence of obstacles can improve the propulsion performance of the flapping caudal fin.Under fixed S,d and U,the maximum average thrust and maximum propulsion efficiency of the flapping caudal fin in the wakes of a vibrating square cylinder were higher than its maximum average thrust and maximum efficiency in the wakes of a vibrating D-shaped cylinder and cylinder wake.When the obstacles are of a D-shaped cylinder,cylinder and square cylinder,the vortex of the opposite D-shaped cylinder,cylindrical vortex and square cylinder vortex and the leading edge vortex of the caudal fin produce an extrusion effect to increase the strength of the leading edge vortex of the caudal fin.关键词
摆动尾鳍/振动障碍物型式/动网格/水动力性能/数值模拟Key words
flapping caudal fin/vibration obstacle type/dynamic mesh/hydrodynamics performance/numerical simulation分类
信息技术与安全科学引用本文复制引用
舒蒋鹏,杨文俊,石小涛,陈小龙,胡晓,谭均军,张立胜..振动障碍物型式对摆动尾鳍水动力性能影响研究[J].计算力学学报,2024,41(6):1037-1044,8.基金项目
国家自然科学基金面上项目(52279069) （52279069）
国家自然科学基金(52179070)资助项目. （52179070）
