Effects of Geometry Parameters on Cooling Performance and Conjugate Thermal-Elastic Property of Double-reverse-Jet Film Cooling
Z. Wang1,2, C. Zhang3, S.-J. Li2, J.-J. Liu1, H.-W. Zhang1
1Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, 100190, China
2School of Energy and Power Engineering, Shandong University, Jinan, 250061, China
3Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, Tianjin, 300384, China
Keywords: пленочное охлаждение парами разнонаправленных струй, геометрические параметры, почковидные "антивихри", связанные мультиполя, температурные напряжения, double-reverse-jet film cooling (DRJFC), geometric parameters, anti-kidney vortices, multi-field coupling, thermal stress
Abstract
In order to investigate the double-reverse-jet film cooling (DRJFC), the multi-field coupling calculating method is used to study the effect of geometric parameters on the resultant vortex structure and conjugate thermal-elastic property. The traditional streamwise film cooling is also investigated for comparison. The results indicate that the formation of effective anti-kidney vortices is the key to enhance the dimensionless temperature of DRJFC holes. At low blowing ratios, the streamwise or lateral distance between two DRJFC holes should be increased to widen the transverse shift of the jets, thus, to increase the cooling performance. At high blowing ratios, the lateral distance should be decreased to prevent two jets from separating apart so that the malfunction of the anti-kidney vortices could be avoided. The stress concentration resulting from the nonuniform temperature distribution is considered.
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