通过数值模拟与压力敏感涂料（PSP）实验相结合的方法，系统研究了在平板条件下多排缝孔布局方式（包括顺排、叉排、错排三种不同构型）、排间距以及孔间距对气膜冷却效率的影响机制。并且采用PSP实验方法验证了五种典型布局方案在0.25-2.0吹风比范围内对气膜冷却效率的影响规律。研究结果表明：布局方式对冷却性能具有决定性影响，其中叉排结构相较于顺排布局展现出更优的展向覆盖性和冷却均匀性，整体冷却效率显著提高；排间距的影响呈现布局依赖性，顺排结构冷却效率随排间距增大而提升，而叉排结构则随排间距减小而增强。顺排结构的面积平均冷却效率从排间距5mm时的0.338提高至20mm时的0.369，对于叉排结构，在排间距为5mm时，面积平均冷却效率达到了最高值0.500。在冷气流量限制条件下，减小孔间距可通过增加孔密度有效提升整体冷却效果。对于优选孔排结构，在叉排结构中，吹风比为2.0时，排间距为5mm时，面积平均冷效达到了最大值0.44。

This study systematically investigates the influence of multi-row trapezoidal slot hole arrangements (including in-line, staggered, and other three typical configurations), row spacing and hole spacing on film cooling effectiveness under flat plate conditions, employing a combined approach of numerical simulation and pressure-sensitive paint (PSP) experimental techniques. The PSP experiments validate the cooling performance of five different configurations over a blowing ratio range of 0.25–2.0. The results demonstrate that the arrangement pattern plays a decisive role in cooling performance. Specifically, the staggered configuration exhibits superior lateral coverage and cooling uniformity compared to the in-line arrangement, leading to a significant improvement in overall cooling effectiveness. The effect of row spacing is arrangement-dependent: for in-line configurations, cooling effectiveness increases with larger row spacing, whereas for staggered configurations, it improves with reduced row spacing. The area-averaged cooling effectiveness of the staggered arrangement increased from 0.338 at a spacing of 5 mm to 0.369 at 20 mm. In the case of the crossed arrangement, the area-averaged cooling effectiveness reached its maximum value of 0.500 at a spacing of 5 mm. Under coolant flow limitations, decreasing hole spacing enhances overall cooling performance by increasing hole density. For the optimized hole arrangement, the area-averaged cooling effectiveness reached its maximum value of 0.44 at a spacing of 5 mm with a blow ratio of 2.0 in the crossed configuration.

V231.3

国家自然科学基金项目（面上项目，重点项目，重大项目）,陕西省重点研发计划