Imperial College London
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DrGanHuang

Faculty of Engineering, Department of Chemical Engineering

Honorary Research Fellow
 
 
 
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Contact

 

g.huang

 
 
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Location

 

ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Min:2019:10.1115/1.4042009,
author = {Min, Z and Huang, G and Parbat, SN and Yang, L and Chyu, MK},
doi = {10.1115/1.4042009},
journal = {Journal of Turbomachinery},
title = {Experimental Investigation on Additively Manufactured Transpiration and Film Cooling Structures},
url = {http://dx.doi.org/10.1115/1.4042009},
volume = {141},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - <jats:p>The last 50 years has witnessed significant improvement in film cooling technologies while transpiration cooling is still not implemented in turbine airfoil cooling. Although transpiration cooling could provide higher cooling efficiency with less coolant consumption compared to film cooling, the fine pore structure and high porosity in transpiration cooling metal media always raised difficulties in conventional manufacturing. Recently, the rapid development of additive manufacturing (AM) has provided a new perspective to address such challenge. With the capability of the innovative powder bed selective laser metal sintering (SLMS) AM technology, the complex geometries of transpiration cooling part could be precisely fabricated and endued with improved mechanical strength. This study utilized the SLMS AM technology to fabricate the transpiration cooling and film cooling structures with Inconel 718 superalloy. Five different types of porous media including two perforated plates with different hole pitches, metal sphere packing, metal wire mesh, and blood vessel shaped passages for transpiration cooling were fabricated by EOS M290 system. One laidback fan-shaped film cooling coupon was also fabricated with the same printing process as the control group. Heat transfer tests under three different coolant mass flow rates and four different mainstream temperatures were conducted to evaluate the cooling performance of the printed coupons. The effects of geometry parameters including porosity, surface outlet area ratio, and internal solid–fluid interface area ratio were investigated as well. The results showed that the transpiration cooling structures generally had higher cooling effectiveness than film cooling structure. The overall average cooling effectiveness of blood vessel-shaped transpiration cooling reached 0.35, 0.5, and 0.57, respectively, with low (1.2%), medium (2.4%), and high (3.6%) coolant injection ratios. The morphological parameters anal
AU  - Min,Z
AU  - Huang,G
AU  - Parbat,SN
AU  - Yang,L
AU  - Chyu,MK
DO  - 10.1115/1.4042009
PY  - 2019///
SN  - 0889-504X
TI  - Experimental Investigation on Additively Manufactured Transpiration and Film Cooling Structures
T2  - Journal of Turbomachinery
UR  - http://dx.doi.org/10.1115/1.4042009
VL  - 141
ER  -
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