The effect of relative position of two rows of film holes on film cooling performance was experimentally and numerically investigated on each side (suction side and pressure side) of rotating blade leading edge. The film cooling performance was measured by pressure sensitive paint and phase-locked techniques. The numerical simulation was also employed to improve the understanding of flow filed. The first row of film holes is fixed at α₁ = ±10° downstream of stagnation line and is followed by the second row of holes with staggered arrangement. The span-wise relative positions between two rows of holes, P₂/P₁, are ranged from 1/4 to 3/4. Meanwhile, the stream-wise location of second row of holes is varied from α₂ = ±25° to ±40°. Five blowing ratios ranged from 0.5 to 2.0 are also employed. The results indicate that the effect of relative position of two rows on film cooling is different on the two sides of leading edge. On the suction side, the relative position between two rows of holes significantly affects the interaction between the adjacent jets from two rows, which determines the distribution and value of film cooling effectiveness. When it comes to the leading edge pressure side, closer distance between two adjacent holes in two rows produces better film cooling performance. Meanwhile, the effect of relative position between two rows of holes is mainly located in the near hole region.

在旋转叶片前缘的每一侧（吸入侧和压力侧），通过实验和数值研究了两排油膜孔的相对位置对油膜冷却性能的影响。通过压敏涂料和锁相技术测量薄膜冷却性能。数值模拟也被用来提高对流场的理解。第一排膜孔固定在 滞流线下游的α ₁ = ±10°处，其后是交错排列的第二排孔。两排孔之间的跨度相对位置P ₂ /P ₁的范围为1/4至3/4。同时，第二排孔的流向位置从 α ₂ = ±25° 至 ±40°。还采用了 0.5 至 2.0 的五个吹塑比。结果表明，前缘两侧两排相对位置对气膜冷却的影响不同。在吸入侧，两排孔之间的相对位置显着影响了相邻两排射流之间的相互作用，决定了气膜冷却效果的分布和大小。在前缘压力侧，两排相邻的两个孔之间的距离越近，薄膜冷却性能越好。同时，两排孔相对位置的影响主要位于近孔区域。