涡轮叶片冷却有效性分析
收稿日期: 2012-02-14
修回日期: 2012-06-01
网络出版日期: 2013-01-19
基金资助
省部级项目
Analysis of Turbine Blade Cooling Effectiveness
Received date: 2012-02-14
Revised date: 2012-06-01
Online published: 2013-01-19
Supported by
Ministry-level Project
丁阳 , 常海萍 . 涡轮叶片冷却有效性分析[J]. 航空学报, 2013 , 34(1) : 46 -51 . DOI: 10.7527/S1000-6893.2013.0006
In order to figure out how internal heat exchange efficiency and film cooling effectiveness influence the overall cooling effectiveness, a simplified physical model has been built to analyze factors that influence turbine blade overall cooling effectiveness. Several conclusions are drawn as follows. Under low relative heat load, the overall cooling effectiveness rises as the internal heat exchange efficiency improves, which indicates that the internal heat exchange efficiency has a strong positive effect on the overall cooling effectiveness. Under high relative heat load, film cooling effectiveness has a stronger effect on overall cooling effectiveness, while the influence of internal heat exchange efficiency decreases. As internal heat exchange efficiency increases, excessive heat load makes overall cooling effectiveness decrease, which leads to the failure of internal cooling.
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