摆动方式对水翼输入功率的影响

发布时间：2018-04-14 10:12

本文选题：水翼 + 主动摆动　；参考：《计算力学学报》2017年05期

【摘要】：利用投影浸入边界法,研究了不同主动摆动方式对水翼输入功率的影响。计算模型采用二维NACA0012翼型,雷诺数Re=800。最大摆角θ0=75°,摆动频率f的变化范围为0.1Hz~0.2Hz,非正弦摆动参数β的变化范围为1~3。首先,研究摆动频率f和非正弦摆动参数β对平均输入功率的影响,研究发现,平均输入功率随着f和β值的增加而增加,但当f0.16 Hz,β2.5时,平均输入功率急剧增加。其次,在摆动频率f=0.16 Hz时,研究不同非正弦摆动参数β下力矩系数、输入功率系数以及升阻力系数随时间的变化规律,研究发现,随着β值的增加,峰值输入功率也逐渐增加,而且β值影响峰值输入功率出现的位置。最后,研究不同β值下,变化的尾流发展对输入功率的影响,认为水翼上下表面产生的后缘涡与升阻力有关系,水翼上表面的负涡对水翼摆动产生阻力,而下表面的负涡对水翼摆动产生升力,从而对水翼摆动的输入功率产生影响。
[Abstract]:The influence of different active swinging modes on the input power of hydrofoil is studied by means of projection immersion boundary method.The model is a two-dimensional NACA0012 airfoil with a Reynolds number of 800.The maximum swing angle is 75 掳, the range of wobble frequency f is 0.1 Hz ~ 0.2Hz, and the variation range of non-sinusoidal swing parameter 尾 is 1 ~ 3 ~ 3.Firstly, the influence of the swing frequency f and the non-sinusoidal swing parameter 尾 on the average input power is studied. It is found that the average input power increases with the increase of f and 尾 values, but when f 0.16 Hz, 尾 2.5, the average input power increases sharply.Secondly, the variation of torque coefficient, input power coefficient and lift resistance coefficient with time at different non-sinusoidal swing parameters 尾 are studied when the swing frequency is 0.16 Hz. It is found that the peak input power increases gradually with the increase of 尾 value.And the 尾 value affects the position where the peak input power occurs.Finally, the influence of varying wake development on input power under different 尾 values is studied. It is considered that the trailing edge vortices produced by the upper and lower surfaces of the hydrofoil are related to the lift resistance, and the negative vorticity on the upper surface of the hydrofoil produces resistance to the hydrofoil wobble.The negative vortices on the lower surface of the hydrofoil have a lift effect on the input power of the hydrofoil wobble.
【作者单位】：昆明理工大学建筑工程学院工程力学系;
【基金】：国家自然科学基金(51479085,11262008) 霍英东青年基金(141120)资助项目
【分类号】：O352

【相似文献】