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高频同相扰动信号对升沉扑翼水动力性能影响 被引量:1

Effects of high-frequency in-phase perturbation signals on heaving foil hydrodynamic performance
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摘要 为探究外界输入正弦扰动信号对升沉扑翼推进性能和尾涡结构的影响,采用数值模拟方法研究了在一个升沉扑翼的基础正弦输入信号中加入高频同相正弦扰动.数值计算结果表明:在大多数情况下,引入扰动增加了轴向推力,尤其是当基频为0.50 Hz时,外加12 Hz扰频促使轴向推力增加至原来的843.5%.计算结果证实:仅在基频较低的情况下,升沉扑翼能拥有良好的推进效率,随着基频或扰频的增大,扑翼推进效率均呈下降趋势.结果表明:当最低基频为0.50 Hz时,随着扰频的增加,尾涡结构在扰频为4 Hz情况下开始由无明显涡脱落模式转换为2S模式;当基频为0.75 Hz时,尾涡结构随着扰频的增加由2P模型转换为2S模式;在1.00,1.25,1.50,1.75 Hz基频情况下,尾涡结构随着扰频的增加由2S模式变得杂乱. To investigate the effect of external input sinusoidal perturbation signals on the propulsive performance and wake structure of a heaving foil,numerical simulation method was used to investigate the effect of adding high-frequency in-phase sinusoidal perturbations to the basic sinusoidal input signal of a heaving foil.Numerical calculation results show that in most cases,the introduction of perturbation increases the axial thrust,especially when the fundamental frequency is 0.50 Hz,the addition of 12 Hz perturbation drives the axial thrust to 843.5%of the original.The calculation results confirm that the heaving foil can have good propulsion efficiency only at low base frequency,and the foil propulsion efficiency tends to decrease with the increase of base frequency or perturbation frequency.Results show that when at the lowest base frequency of 0.50 Hz,with the increase of the perturbation frequency,the vortex structure starts to convert from the model without obvious vortex shedding to the 2S model at the perturbation frequency of 4 Hz;when at the base frequency of 0.75 Hz,the vortex structure converts from the 2P model to the 2S model with the increase of the perturbation frequency;when at the base frequency of 1.00,1.25,1.50 and 1.75 Hz,the vortex structure becomes chaotic from the 2S model with the increase of the perturbation frequency.
作者 高鹏骋 黄桥高 潘光 赵嘉祯 GAO Pengcheng;HUANG Qiaogao;PAN Guang;ZHAO Jiazhen(School of Marine Science and Technology,Northwestern Polytechnical University,Xi'an 710072,China;Key Laboratory of Unmanned Underwater Vehicle Technology of Ministry of Industry and Information Technology,Northwestern Polytechnical University,Xi'an 710072,China)
出处 《华中科技大学学报(自然科学版)》 EI CAS CSCD 北大核心 2022年第4期124-130,共7页 Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金 国家自然科学基金资助项目(51879220) 国家重点研发计划资助项目(2020YFB1313201) 中央高校基本科研业务费专项资金资助项目(3102019HHZY030019,3102020HHZY030018).
关键词 升沉扑翼 正弦扰动 推力性能 推进效率 尾涡结构 heaving foil sinusoidal perturbation thrust performance propulsion efficiency vortex structure
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