TY - GEN
T1 - COOLING EFFECTIVENESS OF ADDITIVE-MANUFACTURED INTERNAL STRUCTURE WITHIN A DOUBLE WALL COOLING SYSTEM
AU - Song, Ho Seop
AU - Park, Hee Seung
AU - Kim, Taehyun
AU - Choi, Seungyeong
AU - Moon, Hee Koo
AU - Cho, Hyung Hee
N1 - Publisher Copyright:
© 2023 by ASME.
PY - 2023
Y1 - 2023
N2 - An internal structure that additively manufactured (AM) within a double-wall cooling system for gas turbine applications was proposed and evaluated for its ability to increase cooling efficiency. Polymer AM specimens were fabricated using a Biot number similarity approach with actual gas turbine materials. Three types of double wall specimens were manufactured: a standard double wall cooling (baseline) case, a double wall cooling with pin-fin structure (pin), and a double wall cooling with a cube lattice structure(cube). Flow pattern analysis was conducted to examine the effect of the cube lattice on the internal structure of the double wall cooling system, and static pressure was measured in each chamber. An infrared thermography method was used to measure overall cooling effectiveness on the specimen surface, and each case was tested at blowing ratios (M=0.4, 0.6, and 0.8). Compared to the baseline case, the cube lattice structure improved cooling effectiveness by 3.36% at M=0.4, the most significant improvement of 4.33% at M=0.6, and 2.71% at M=0.8. These findings suggest that the use of a cube lattice structure that produced by AM can effectively enhance the cooling performance in double wall cooling system for gas turbine hot parts.
AB - An internal structure that additively manufactured (AM) within a double-wall cooling system for gas turbine applications was proposed and evaluated for its ability to increase cooling efficiency. Polymer AM specimens were fabricated using a Biot number similarity approach with actual gas turbine materials. Three types of double wall specimens were manufactured: a standard double wall cooling (baseline) case, a double wall cooling with pin-fin structure (pin), and a double wall cooling with a cube lattice structure(cube). Flow pattern analysis was conducted to examine the effect of the cube lattice on the internal structure of the double wall cooling system, and static pressure was measured in each chamber. An infrared thermography method was used to measure overall cooling effectiveness on the specimen surface, and each case was tested at blowing ratios (M=0.4, 0.6, and 0.8). Compared to the baseline case, the cube lattice structure improved cooling effectiveness by 3.36% at M=0.4, the most significant improvement of 4.33% at M=0.6, and 2.71% at M=0.8. These findings suggest that the use of a cube lattice structure that produced by AM can effectively enhance the cooling performance in double wall cooling system for gas turbine hot parts.
KW - Additive manufacturing
KW - Double wall cooling
KW - Lattice structure
KW - Overall cooling effectiveness
UR - https://www.scopus.com/pages/publications/85177556799
U2 - 10.1115/GT2023-102153
DO - 10.1115/GT2023-102153
M3 - Conference contribution
AN - SCOPUS:85177556799
T3 - Proceedings of the ASME Turbo Expo
BT - Heat Transfer - General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, GT 2023
Y2 - 26 June 2023 through 30 June 2023
ER -
