CAJ | 학술논문

利用计算流体力学软件Fluent开展动波壁圆柱绕流的数值计算,建立二维运动波浪壁圆柱模型。在来流速度u=0.005 m/s、雷诺数Re=500的情况下,开展动波壁波动速度c=0,0.005,0.01,0.015,0.02,0.025,0.03,0.04 m/s等8个工况的计算分析,并比较不同波动速度对流场结构、升力、阻力特性的影响。结果表明：动波壁圆柱能有效抑制流动的分离,消除交替脱落的尾涡,减阻效果突出；随着波动速度的增大,平均阻力系数呈明显下降趋势；当波速超过0.025 m/s时,阻力变为负值,即波动圆柱产生一定的推力。
이용계산류체역학연건Fluent개전동파벽원주요류적수치계산,건립이유운동파랑벽원주모형。재래류속도u=0.005 m/s、뢰낙수Re=500적정황하,개전동파벽파동속도c=0,0.005,0.01,0.015,0.02,0.025,0.03,0.04 m/s등8개공황적계산분석,병비교불동파동속도대류장결구、승력、조력특성적영향。결과표명：동파벽원주능유효억제류동적분리,소제교체탈락적미와,감조효과돌출；수착파동속도적증대,평균조력계수정명현하강추세；당파속초과0.025 m/s시,조력변위부치,즉파동원주산생일정적추력。
This article based on CFD software Fluent, developed the numerical calculation of wavy wall circular cylinder and established the model of the two DOF wavy wall circular cylinder. Under the of same inflow velocity u, Reynolds number Re and different fluctuation velocities where u=0. 005 m/s, Re=500 and c =0, 0. 005, 0. 01, 0. 015, 0. 02, 0. 025, 0. 03, 0. 04 m/s, the paper developed the computational analysis of wavy wall circular cylinder. Furthermore, the paper compared the influence of flow field structure, the lift and drag characteristics under different fluctuation velocities. The results show that wavy wall cylinder can suppress flow separation effectively and eliminate the alternate shedding trailing vortex. The drag reduction effect is remarkable. The average drag coefficient is decreased obviously with the increased fluctuation velocity. When the wave velocity exceed 0. 025 m/s,resistance turn to negative. Then the wavy wall circular cylinder generate thrust.