Numerical Investigation of Partial Blockage Effect on Film Cooling Effectiveness
Joint Authors
Jing-zhou, Zhang
Cheng-xiong, Pan
Ke-nan, Huang
Source
Mathematical Problems in Engineering
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-08-26
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Three-dimensional numerical calculation was performed to investigate the effects of partial blockage inside cylindrical film holes on the film cooling effectiveness over a flat plate.
Five blockage ratios ranged from 0.1 to 0.5 and a series of blockage positions were considered under the blowing ratios of 0.3–1.5.
It is found that the blockage position has a significant influence on mainstream-coolant jet interaction.
The partial blockage located at the leading edge of coolant-hole exit mitigates the primary vortices due to mainstream-coolant jet interaction.
The coolant jet penetration along vertical direction is suppressed and the peak velocity along streamwise direction is augmented under the action of partial blockage at the upstream side of film holes, providing an increment of film cooling effectiveness, especially under high blowing ratio.
While the partial blockages located at the trailing or lateral edges of coolant-hole exit weaken the film cooling effectiveness.
In relation to the partial blockage located in the vicinity of coolant-hole exit, the partial blockage located in the vicinity of coolant-hole inlet or middle has less impaction on the film cooling effectiveness under low blowing ratio.
American Psychological Association (APA)
Cheng-xiong, Pan& Jing-zhou, Zhang& Ke-nan, Huang. 2014. Numerical Investigation of Partial Blockage Effect on Film Cooling Effectiveness. Mathematical Problems in Engineering،Vol. 2014, no. 2014, pp.1-13.
https://search.emarefa.net/detail/BIM-1044037
Modern Language Association (MLA)
Cheng-xiong, Pan…[et al.]. Numerical Investigation of Partial Blockage Effect on Film Cooling Effectiveness. Mathematical Problems in Engineering No. 2014 (2014), pp.1-13.
https://search.emarefa.net/detail/BIM-1044037
American Medical Association (AMA)
Cheng-xiong, Pan& Jing-zhou, Zhang& Ke-nan, Huang. Numerical Investigation of Partial Blockage Effect on Film Cooling Effectiveness. Mathematical Problems in Engineering. 2014. Vol. 2014, no. 2014, pp.1-13.
https://search.emarefa.net/detail/BIM-1044037
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1044037