| 具有热障涂层的导向叶片耦合数值研究 |
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| 引用本文： | 胡冰城,王建华,徐华昭,吴伟龙,徐景亮.具有热障涂层的导向叶片耦合数值研究[J].航空动力学报,2017,32(10):2394-2402. |
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| 作者姓名： | 胡冰城 王建华 徐华昭 吴伟龙 徐景亮 |
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| 作者单位： | 1.中国科学技术大学 热科学和能源工程系，合肥 230027 |
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| 基金项目： | 国家自然科学基金（51376168） |
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| 摘 要： | 利用气固耦合换热方法，对具有热障涂层（TBC）的、高度一体化的一级透平导向叶片的流动和换热特性进行了数值研究。结果表明:在接近真实透平高温高压运行的环境下，TBC对于叶栅通道的气动特性影响可以忽略不计；在冷气流量被减少的情况下，TBC在叶片前缘依然可以明显降低叶片金属表面温度和传热系数；但是，随着冷气流量的减少，TBC的作用在压力面尾缘急剧下降，在吸力面尾缘缓慢下降。对3个高度截面的平均金属温度定量比较得出:在同等冷却效率的条件下，厚度为0.15mm的TBC可以节约20%~30%的冷气流量。
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| 关 键 词： | 热障涂层(TBC) 导向叶片 冷却 耦合换热 高度一体化 |
| 收稿时间： | 2016/3/7 0:00:00 |
Numerical investigation of a thermal barrier coated vane using conjugate heat transfer approach |
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| HU Bingcheng,WANG Jianhua,XU Huazhao,WU Weilong,XU Jingliang.Numerical investigation of a thermal barrier coated vane using conjugate heat transfer approach[J].Journal of Aerospace Power,2017,32(10):2394-2402. |
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| Authors: | HU Bingcheng WANG Jianhua XU Huazhao WU Weilong XU Jingliang |
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| Abstract: | Based on conjugate heat transfer,numerical investigation was carried out on a highly integrated first stage vane with thermal barrier coating (TBC).The numerical results showed that,under the condition close to real engine operation where temperature and pressure were very high,the effect of TBC on the areodynamic features in the cascade can be neglected.However,as the mass flow rate of cooling air decreased within a certain range,TBC could still reduced the temperature and heat transfer coefficient near the leading edge conspicuously.With the decrease of the coolant flow rate,the effect of TBC on the trailing edge of pressure side dropped heavily,but slowly on suction side.A quantitative comparison of the metal temperature averaged over three spanwise sections indicates that,with the equivalent overall cooling effectiveness achieved,TBC with a thickness of 0.15 mm can save the mass flow rate of coolant by 20％-30％. |
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| Keywords: | thermal barrier coating(TBC) nozzle guide vane cooling conjugate heat transfer highly integrated |
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