| Citation: | XU Ningning, LYU Dong, KONG Xing’ao, et al. Study on advantages of flow resistance reduction for honeycomb-like double-wall cooling structures[J]. Journal of Aerospace Power, 2025, 40（5）：20230503 doi: 10.13224/j.cnki.jasp.20230503
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Double-wall cooling structure should be applied to the high-cooling efficiency turbine blade. But the previous works discovered its tremendous flow resistance, which caused the difficulties in applications. A novel honeycomb-like double-wall cooling structure was proposed to solve this issue. Flow resistance comparison experiments between 2 double-wall structures were carried out using a small wind tunnel and 3D printing components under ordinary operating conditions. Compared with the typical lamilloy with the equal structural criterion numbers, the total pressure loss of the honeycomb-like scheme could be reduced by about 20.5% to 22.5% under the same upstream Reynolds number, and the total pressure recovery coefficient could be increased by up to 1.4%. The strengthening mechanism of the novel scheme was clearly revealed by replicating numerical simulations of the experimental process, with more effective flow organization and vorticity suppression. These advantages were proved by uncertainty analysis and verification between experiment and simulation methods.
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