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	冲击冷却对燃气轮机尾缘双流程内冷通道传热和压损的影响
	阚瑞 ; 任静 ; 蒋洪德 ; KAN Rui ; REN Jing ; JIANG Hong-De
	2016-03-30 ; 2016-03-30
关键词	燃气轮机内部冷却 冲击冷却 双流程通道 gas turbine internal cooling impingement cooling two-pass duct TK471
其他题名	Effect of Local Impingement on Heat Transfer and Pressure Loss of a Two-Pass Trailing-Edge Duct in Gas Turbine Blade
中文摘要	燃机内部冷却的目标是采用更小的流量和压力损失实现通道对流传热系数的提高,并利用均匀的冷却减小热应力。本文采用数值模拟手段,研究了局部冲击冷却对带侧向出流的尾缘双流程通道传热和压损的影响。研究表明:动叶尾缘通道由于侧向出流,在页顶出现一个显著的大回流涡,当地传热系数低,易造成叶片局部温度和热应力偏高。通过在U型通道的隔板布置冲击子孔,可以有效地减小通道中分离涡的影响,提高通道末端的传热,并在对通道平均传热系数影响不大的前提下,显著降低通道阻力。使射流与靶面尽量垂直有助于达到最好的冷却效果。; The goal of gas turbine blade internal cooling is to increase internal heat transfer coefficients and reduce thermal stress,with less coolant and smaller pressure loss.The impact of local impingement in a two-pass trailing-edge internal cooling channel was investigated in the current study with CFD.Results showed that a large vortex exists near the tip of the blade.The corner vortex results in small local heat transfer coefficients and may cause increased thermal stress.Impingement inside the two-pass channel can eliminate the impact of corner vortex,thus enhance the heat transfer near the tip of the blade.The average heat transfer coefficient has no significant change,but the friction loss is greatly reduced.Arranging the impingement holes towards the target wall can result in the highest heat transfer.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/142012]
专题	清华大学
推荐引用方式 GB/T 7714	阚瑞,任静,蒋洪德,等. 冲击冷却对燃气轮机尾缘双流程内冷通道传热和压损的影响[J],2016, 2016.
APA	阚瑞,任静,蒋洪德,KAN Rui,REN Jing,&JIANG Hong-De.(2016).冲击冷却对燃气轮机尾缘双流程内冷通道传热和压损的影响..
MLA	阚瑞,et al."冲击冷却对燃气轮机尾缘双流程内冷通道传热和压损的影响".(2016).

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