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阻力危机是一种流体力学的现象,是流场的雷诺数增加到一定程度时,其阻力系数突然下降的现象。针对圆形物体(例如球或是圆柱)的阻力危机现象已有详尽的研究[1] 。当雷诺数增加到大约300000时,阻力系数会快速的由0.5变成0.2,此时会产生较窄的湍流尾流。阻力危机的现象也和物体的表面粗糙度有关[2]。
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