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首页> 外文会议>2003 ASME(American Society of Mechanical Engineers) Turbo Expo; Jun 16-19, 2003; Atlanta, Georgia >A NEW CONCEPT OF IMPINGEMENT COOLING FOR GAS TURBINE HOT PARTS AND ITS INFLUENCE ON PLANT PERFORMANCE
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A NEW CONCEPT OF IMPINGEMENT COOLING FOR GAS TURBINE HOT PARTS AND ITS INFLUENCE ON PLANT PERFORMANCE

机译：燃气轮机热部件冲击冷却的新概念及其对工厂性能的影响

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Significant improvements in gas turbine cooling technology are becoming harder as progress goes over and over. Several impingement cooling solutions have been extensively studied in past literature. An accurate and extensive numerical 1D simulation on a new concept of sequential impingement was performed, showing good results. Instead of having a single impingement plate, we used several perforated plates, connecting the inlet of each one with the outlet of the previous one. Main advantages are: absence of the negative interaction between transverse flow and last rows impinging jets (reduced deflection); better distribution of pressure losses and heat transfer coefficients among the different plates, especially when pressure drops are significant and available coolant mass flow rate is low (lean premixed combustion chamber and LP turbine stages). Practical applications can have a positive influence on both cooled nozzles and combustion chambers, in terms of increased cooling efficiency and coolant mass flow rate reduction. Calculated effects are used to analyze main influences of such a cooling system on global performances of power plants.
机译：随着进步的不断深入，燃气轮机冷却技术的重大改进变得越来越困难。在过去的文献中已经对几种冲击冷却方案进行了广泛的研究。在顺序撞击的新概念上进行了精确且广泛的一维数值模拟，显示了良好的结果。我们没有使用单个冲击板，而是使用了几个多孔板，将每个孔的入口与前一个孔的出口连接起来。主要优点是：横流与最后一排撞击射流之间没有负相互作用（减小的偏转）；压力损失和传热系数在不同板之间的分布更好，尤其是在压降明显且可用冷却剂质量流速低时（稀混合气燃烧室和低压透平级）。在提高冷却效率和降低冷却剂质量流量方面，实际应用对冷却喷嘴和燃烧室都有积极影响。计算出的效果用于分析这种冷却系统对发电厂整体性能的主要影响。

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