Yao, Jun and Sian, Sohan and Yao, Yufeng and Davis, Tony W. (2010) Numerical study of hole shape effect on blade cooling effectiveness. Modern Physics Letters B: Condensed Matter and Statistical Physics , 13 (24). pp. 1295-1298. ISSN 0217-9849

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Abstract

Numerical study of hole shape effect on blade adiabatic cooling effectiveness has been carried out on four geometry models of a standard cylindrical hole, a cylindrical hole with an upstream ramp, a shaped diffuser, and a double console slot. In all cases, the hole centerline has an inclination angle of 35 degrees against the mainstream gas flow. Results of the cylindrical hole model are in good agreement with available experimental and numerical data. For three hole geometry variants considered, it was found that the cooling effectiveness has been considerably enhanced by a max factor of 2, compared to that from the base model. The physical mechanism for this is mainly due to the weakening of coolant flow penetration in the vicinity of the hole exit, thus reduces the level of mixing and the entrainment with the surrounding hot gas flow.

Item Type:	Article
Keywords:	hole shape effect, adiabatic cooling effectiveness, ref15, refdoi
Subjects:	H Engineering > H321 Turbine Technology
Divisions:	College of Sciences > Faculty of Science > Lincoln School of Engineering
Depositing User:	Jun Yao
Date Deposited:	06 May 2012 23:04
Last Modified:	05 Jun 2013 14:36
URI:	http://eprints.lincoln.ac.uk/id/eprint/5424

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