Three-dimensional simulations of the squealer tip on the GE-E3 blade with eight film cooling holes were carried out. The effect of the rim width and the blowing ratio on the blade tip flow and cooling performance were revealed. Numerical simulations were performed to predict the leakage flow and the tip heat transfer with the k–ɛ model. For the squealer tip, the depth of the cavity is fixed but the rim width varies to form a wide cavity, which can decrease the coolant momentum and the tip leakage flow velocity. This cavity contributes to the improvement of the cooling effect in the tip zone. To investigate the influence on the tip heat transfer by the rim width, numerical simulations were performed as a two-part study: (1) unequal rim width study on the pressure side and the suction side and (2) equal rim width study with rim widths of 0.58%, 1.16%, and 1.74% of the axial chord (0.5 mm, 1 mm, and 1.5 mm, respectively) on both the pressure side rim and the suction side rim. With different rim widths, the effect of different global blowing ratios, i.e., M = 0.5, 1.0 and 1.5, was investigated. It is found that the total heat transfer rate is increasing and the heat transfer rates on the rim surface (RS) rapidly ascend with increasing rim width.
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Forced Convection
Influence of Different Rim Widths and Blowing Ratios on Film Cooling Characteristics for a Blade Tip
Jin Wang,
Jin Wang
MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering,
e-mail: wjwcn00@163.com
Xi’an Jiaotong University
, Xi’an 710049, China
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Bengt Sundén,
Bengt Sundén
Department of Energy Sciences,Division of Heat Transfer,
e-mail: Bengt.Sunden@energy.lth.se
Lund University
, P.O. Box 118, SE-22100 Lund, Sweden
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Qiu-wang Wang
Qiu-wang Wang
MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering,
e-mail: wangqw@mail.xjtu.edu.cn
Xi’an Jiaotong University
, Xi’an 710049, China
Search for other works by this author on:
Jin Wang
MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering,
Xi’an Jiaotong University
, Xi’an 710049, China
e-mail: wjwcn00@163.com
Bengt Sundén
Department of Energy Sciences,Division of Heat Transfer,
Lund University
, P.O. Box 118, SE-22100 Lund, Sweden
e-mail: Bengt.Sunden@energy.lth.se
Qiu-wang Wang
MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering,
Xi’an Jiaotong University
, Xi’an 710049, China
e-mail: wangqw@mail.xjtu.edu.cn
J. Heat Transfer. Jun 2012, 134(6): 061701 (8 pages)
Published Online: May 8, 2012
Article history
Received:
April 14, 2011
Revised:
November 7, 2011
Online:
May 8, 2012
Published:
May 8, 2012
Citation
Wang, J., Sundén, B., Zeng, M., and Wang, Q. (May 8, 2012). "Influence of Different Rim Widths and Blowing Ratios on Film Cooling Characteristics for a Blade Tip." ASME. J. Heat Transfer. June 2012; 134(6): 061701. https://doi.org/10.1115/1.4006017
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