粒子成像测速仪(PIV)技术是一种测量叶轮机械内部流场的有效手段.本文利用对开式前缘弯掠轴流风扇进行PIV实验,捕捉到了开式轴流风扇的叶尖涡.实验结果表明,叶尖涡产生于叶顶前缘的吸力面,其涡核沿一条与旋转方向相反的斜线延伸,一直到转子下游出口.PIV实验数据和CFD内流计算结果吻合良好.本实验为改善风扇性能和认识其内流机制提供了可靠的实验依据.
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