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Yu Songqi, You Ruquan, Liu Runzhou, et al. Internal heat transfer characteristics in curved double-wall laminate cooling structures[J]. Journal of Aerospace Power, 2026, 41(X):20250450 doi: 10.13224/j.cnki.jasp.20250450
Citation: Yu Songqi, You Ruquan, Liu Runzhou, et al. Internal heat transfer characteristics in curved double-wall laminate cooling structures[J]. Journal of Aerospace Power, 2026, 41(X):20250450 doi: 10.13224/j.cnki.jasp.20250450

Internal heat transfer characteristics in curved double-wall laminate cooling structures

doi: 10.13224/j.cnki.jasp.20250450
  • Received Date: 2025-09-30
    Available Online: 2026-05-16
  • This study employed the transient liquid crystal method to experimentally quantify the heat transfer on the target surface of a complex double-wall structure incorporating impingement hole, pin-fins, and slot. The investigation focuses on the effects of curvature (9° concave, 30° convex, and 75° convex) and impingement Reynolds numbers (1000040000). The results demonstrate that as curvature increases, internal heat transfer within the double-wall structure is enhanced. At identical impingement Reynolds numbers, the average convective heat transfer coefficient for 75° convex is approximately 20 W/(m2·K) higher than that of 9° concave. For every increase of 10000 in the impingement Reynolds number, the area-averaged convective heat transfer coefficient rises by about 30 W/(m2·K) across all three curved structures. The increase in the average convective heat transfer coefficient slows down only when the impingement Reynolds number rises from 30000 to 40000. The spanwise distribution of the convective heat transfer coefficient exhibits multiple peaks, with secondary peaks surpassing the primary peak at Reynolds number of 40000. Along the flow direction, the convective heat transfer coefficient generally decreases but displays distinct distribution patterns at different longitudinal positions.

     

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