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本文利用FLUENT软件,针对导向叶片前缘冲击+扰流元+气膜出流的复合冷却结构开展数值研究,分析了扰流元、气膜出流方式等参数对流动和换热效果的影响规律。研究结果表明:前缘腔内扰流柱的加入加强了冲击气流的扰动,提高了强化换热效果,排数变化对冷却效果的影响不大,但流动损失随着扰流柱排数的增加而变大;相同条件下,鳍流气膜比喷淋气膜能更好地保护叶片,冷却效果好,而且随着吹风比的增大,前缘面的综合冷却效率显著提高。
In this paper, FLUENT software was used to conduct a numerical study on the composite cooling structure with guide vane leading edge impact + confluent element + gas film outflow, and the influencing rules of flow and heat transfer effects of spoiler element and gas film outflow pattern were analyzed . The results show that the disturbance of the impingement gas flow is enhanced by the inclusion of the spoiler in the leading edge cavity, which enhances the effect of heat transfer enhancement. The change of row number has little effect on the cooling effect. However, the flow loss increases with the increase of the number of spoiler columns While the larger the flue gas flow rate, the larger the flue gas flow rate and the larger the gas flow rate. The better the cooling effect is, the better the cooling effect is.