为了进一步提高涡轮叶片的内部冷却性能，对基于矩阵肋的双层壁单元进行研究。通过搭建双气路的实验台测量了3种不同孔位置下外腔靶面的传热，并使用经验证过的湍流模型（SST k-w）分析射流孔不同位置（1/4S:靠近肋侧壁、1/2S:子通道中心、3/4S:子通道中心线与肋侧壁之间）的传热影响。结果表明，位于矩阵子通道中心线（1/2S）的射流孔在2层（矩阵内腔和射流腔）之间传热效果最佳，且在2层中的强化传热系数高于6；内层矩阵通道和外层多孔射流之间形成了一种协同冷却，不仅增强了整体综合热效率，还提高了靶面冷却均匀性，有助于延长叶片的使用寿命。
In order to further improve the internal cooling performance of turbine blades, a study was conducted on a double-walled structure based on lattice ribs. A test bench with two gas paths was built to measure the heat transfer on the target surface of the external cavity at three different hole positions. A validated turbulence model (SST k-ω) was utilized to analyze the heat transfer effects at different jet hole locations: 1/4S (near the rib sidewall), 1/2S (the center of the subchannel), and 3/4S (between the subchannel centerline and the rib sidewall). The results indicate that jet holes located at the centerline (1/2S) of the lattice sub-channel produced the optimal heat transfer distribution between the two layers (lattice cavity and jet cavity), with the enhanced heat transfer level exceeding 6 in both layers. A highly synergistic cooling effect is formed between the inner lattice rib channel and the outer multi-hole jet. This not only enhances the overall comprehensive thermal efficiency but also improves the uniformity of the target surface cooling, which is beneficial for extending the service life of the blade.
2025,47(10): 107-114 收稿日期：2024-8-7
DOI：10.3404/j.issn.1672-7649.2025.10.018
分类号：U664.5
基金项目：国家自然科学基金资助项目（52201352）
作者简介：李邢伟（1999-），男，硕士研究生，研究方向为船用燃气轮机传热与冷却技术
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