Corltjugate Heat Transfer Characterization in Cooling Channels

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	Corltjugate Heat Transfer Characterization in Cooling Channels
	Beni Cukurel; Tony Arts; Claudio Selcan
刊名	JOURNAL OF THERMAL SCIENCE
	2012
卷号	21 期号:3 页码:286,294
关键词	Conjugate Heat Transfer Turbine Cooling Channel Convection Infrared Thermography
英文摘要	Cooling technology of gas turbine blades, primarily ensured via internal forced convection, is aimed towards withdrawing thermal energy from the airfoil. To promote heat exchange, the walls ofintemal cooling passages are lined with repeated geometrical flow disturbance elements and surface non-uniformities. Raising the heat transfer at the expense ofincreased pressure loss; the goal is to obtain the highest possible cooling effectiveness at the lowest possible pressure drop penalty. The cooling channel heat transfer problem involves convection in the fluid domain and conduction in the solid. This coupled behavior is known as conjugate heat transfer. This experimental study models the effects ofconduction coupling on convective heat transfer by applying iso-heat-flux boundary condition at the extemal side of a scaled serpentine passage. Investigations involve local temperature measurements per- formed by Infrared Thermography over flat and ribbed slab configurations. Nusselt number distributions along the wetted surface are obtained by means ofheat flux distributions, computed from an energy balance within the metal domain. For the flat plate experiments, the effect of conjugate boundary condition on heat transfer is estimated to be in the order of 3%. In the ribbed channel case, the normalized Nusselt number distributions are compared with the basic flow features. Contrasting the findings with other conjugate and convective iso-heat-flux literature, a high degree of overall correlation is evident.
公开日期	2013-01-07
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/51771]
专题	工程热物理研究所_Journal of Thermal Science
推荐引用方式 GB/T 7714	Beni Cukurel,Tony Arts,Claudio Selcan. Corltjugate Heat Transfer Characterization in Cooling Channels[J]. JOURNAL OF THERMAL SCIENCE,2012,21(3):286,294.
APA	Beni Cukurel,Tony Arts,&Claudio Selcan.(2012).Corltjugate Heat Transfer Characterization in Cooling Channels.JOURNAL OF THERMAL SCIENCE,21(3),286,294.
MLA	Beni Cukurel,et al."Corltjugate Heat Transfer Characterization in Cooling Channels".JOURNAL OF THERMAL SCIENCE 21.3(2012):286,294.