Effect of sidewall slots and pin fins on the performance of latticework cooling channel for turbine blades
Effect of sidewall slots and pin fins on the performance of latticework cooling channel for turbine blades
复制标题
侧壁槽和针翅对涡轮叶片网格冷却通道性能的影响
DOI：
10.1016/j.applthermaleng.2017.01.110
复制
发表时间：
2017-05
影响因子：
6.4
通讯作者：
Sun Haiou
中科院分区：
文献类型：
--
作者：
Bu Shi;Yang Lianfeng;Qiu Hanghai;Luan Yigang;Sun Haiou
格子通道是涡轮叶片冷却的一种典型结构。本文旨在通过实验和数值方法对格子冷却通道内的对流换热进行研究。首先，利用瞬态液晶（TLC）技术测量了不同雷诺数下测试晶格通道内的传热，得到了详细的努塞尔数分布；还测量了压降。其次，将实验数据与数值解进行了比较，结果表明两者在压降和换热方面吻合较好。最后，通过数值模拟研究了栅格通道与槽或销翅的混合结构，研究了槽宽、槽形、销翅直径和布局对栅格通道热性能的影响。结果表明，狭缝可以减小总体换热和压降，而针翅可以增大换热和压降。两者都能显著改善换热均匀性。通过引入侧壁槽和引脚片，栅格通道的热工性能得到显著改善。
Latticework channel is a typical structure applied in turbine blade cooling. This paper aims to study the convective heat transfer in latticework cooling channels experimentally and numerically. Firstly, heat transfer in a test latticework channel is measured using transient liquid crystal (TLC) technique under different Reynolds numbers and detailed Nusselt number distribution is obtained. Pressure drop is also measured. Secondly, a comparison between experimental data and numerical solution is presented, which shows a good agreement in terms of pressure drop and heat transfer. Lastly, hybrid structures of latticework channel and slots or pin fins are studied by numerical simulation, the effects of slot width, slot shape and pin fin diameter and layouts on the thermal performance of latticework channel are investigated. The result shows that slot can reduce overall heat transfer and pressure drop, while pin fin can increase heat transfer and pressure drop. Both of them improve the heat transfer uniformity markedly. The thermal performance of latticework channel can be improved significantly with the introduction of sidewall slot and pin fin.
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DOI：
10.1115/91-gt-122
发表时间：
1991-06
期刊：
--
影响因子：
--
作者：
C. Camcı;Kui-soon Kim;S. A. Hippensteele
通讯作者：
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影响因子：
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