Influence of HTC levels on temperature and stress levels in a leading edge impingement system

IF 1.1 Q4 ENGINEERING, MECHANICAL Journal of the Global Power and Propulsion Society Pub Date : 2019-01-31 DOI:10.22261/JGPPS.WLAL1F
R. Pearce, P. Ireland, Edwin Dane
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Abstract

Accurate analysis of the performance of a turbine blade cooling system is essential to allow the blade life to be safely predicted. The latter is essential as the business model for an engine can be strongly dependent on the duration between engine shop visits. Some recent heat transfer research has focused on increasing heat transfer levels in order to reduce turbine blade metal temperatures, however for engine designers it is the life of the blade, determined in part by the stress levels within it, that are of main concern. This paper uses heat transfer and stress analysis within the same software environment to examine the influence of the HTC levels in different regions of an engine representative leading edge impingement cooling system on both metal temperature and stress levels. The results of these analyses are then combined to show that, with attention to cooling in different regions of the blade, reductions in stress levels of 6% can be achieved in the most highly stressed regions of the blade with achievable alterations in heat transfer levels.
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前缘撞击系统中HTC水平对温度和应力水平的影响
准确分析涡轮叶片冷却系统的性能对于安全预测叶片寿命至关重要。后者至关重要,因为发动机的商业模式可能强烈依赖于发动机车间访问之间的持续时间。最近的一些传热研究侧重于提高传热水平,以降低涡轮叶片金属温度,但对于发动机设计师来说,主要关注的是叶片的寿命,部分由其内部的应力水平决定。本文在同一软件环境中使用传热和应力分析来检验发动机代表性前缘冲击冷却系统不同区域的HTC水平对金属温度和应力水平的影响。然后将这些分析的结果结合起来,以表明,在注意叶片不同区域的冷却的情况下,可以在叶片最高应力区域实现6%的应力水平降低,同时可以实现传热水平的改变。
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来源期刊
Journal of the Global Power and Propulsion Society
Journal of the Global Power and Propulsion Society Engineering-Industrial and Manufacturing Engineering
CiteScore
2.10
自引率
0.00%
发文量
21
审稿时长
8 weeks
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