研究低雷诺数和发生体特征对流动特性及流体激振力的影响对开发利用微弱风能有重要意义。本文采用有限容积法,数值模拟了小尺度下(特征尺寸D=Icm)、不同雷诺数(20、40、60、100、200、400、500、1000)、不同发生体形状(圆柱、三角柱、方柱)下的流体流动情况,并对各工况下流动特性、流体激振力进行了分析比较。结果表明:同一发生体下,流体激振力(平均值),ft及其峰值ft,max随着雷诺数Re的增大而增大;同一雷诺数下,ft(三角柱)〉ft(方柱)〉ft(圆柱),ft,max(三角柱)〉ft,max(方柱)〉ft,max(圆柱)。当Re=1000时,ft(三角柱)=0.112N,ft(方柱)=0.0914N,ft(圆柱)=0.077N。
The research on the effect of low Reynolds number and generating body on flow character- istics and fluid vibrating force is of high value to develop and utilize weak breeze energy. In this paper, flow conditions with different generating bodies (circular cylinder, triangle cylinder, square cylinder) and different Reynolds Numbers (20, 40, 60, 100, 200, 400, 500, 1000) are simulated using finite volume method. The flow characteristics and fluid force in different conditions are compared and analyzed. The results show that the maximum value and average value of fluid force, ft and ft increase with Re increasing. At the same time, ft (triangle) 〉 ft(square) 〉 ft (circular); ft,max(triangle) 〉 re,max (square) 〉 ft,max (circular). When Re=1000, ft (triangle)=0.112 N, ft (square)=0.0914 N, ft (circular)=0.077 N.
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