| Citation: | HAN Feng, SONG Yi, CHEN Jiaona, et al. Experimental research on heat transfer characteristics of turbulence cooling of double-wall turbine blade trailing edge[J]. Journal of Aerospace Power, 2025, 40（4）：20240416 doi: 10.13224/j.cnki.jasp.20240416
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Considering the internal structural characteristics of the cooling unit at the trailing edge of a real double-walled blade, the model of an impact-disturbed composite cooling structure was established. The transient Thermochromic Liquid Crystal experimental method was used to study the heat transfer characteristics of the pin-fins under the real outflow condition. Effects of the cooling structure of the pin-fins on the heat transfer at the impact target surface under different geometrical models (no pin-fin model, half-distributed pin-fins model, and full-distributed pin-fins model) were obtained. Results showed that the real outflow condition significantly affected the heat transfer characteristics of the impact target surface, which made the stagnation region of the downstream impact hole cover a larger area and the average Nusselt number (
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