TY - JOUR
T1 - Effects of thermal barrier coating thickness and surface roughness on cooling performance sensitivity of a turbine blade
AU - Du, Zequn
AU - Li, Haiwang
AU - You, Ruquan
AU - Huang, Yi
N1 - Publisher Copyright:
© 2023 The Authors
PY - 2023/12
Y1 - 2023/12
N2 - In this study, the conjugate heat transfer method is used to research the impact of the thermal barrier coating thickness (0–300 μm) and surface roughness (Ra = 0–30 μm) on the cooling characteristics of the high-pressure turbine blade. A physical thin-walled structure is applied to simulate the TBC on the turbine blade surface. The results indicate that the temperature distribution on the coated metal surface is more uniform. With an increase in coating thickness, the heat flux of the blade surface decreases, reaching a maximum of 106W/m2 at the leading edge. Furthermore, leading-edge temperature is the most sensitive to changes in coating thickness, and the pressure surface is the least sensitive. The overall cooling effectiveness is less sensitive to changes in the roughness after coating. Increasing the surface roughness, the heat flux reduces at the leading edge and increases at other places. The range of the overall cooling effectiveness rate of the blade rises, and the sensitivity of the overall cooling effectiveness to the coating thickness increases. When Ra reaches 20 μm, the insulation effect with different coating thickness remains unaffected.
AB - In this study, the conjugate heat transfer method is used to research the impact of the thermal barrier coating thickness (0–300 μm) and surface roughness (Ra = 0–30 μm) on the cooling characteristics of the high-pressure turbine blade. A physical thin-walled structure is applied to simulate the TBC on the turbine blade surface. The results indicate that the temperature distribution on the coated metal surface is more uniform. With an increase in coating thickness, the heat flux of the blade surface decreases, reaching a maximum of 106W/m2 at the leading edge. Furthermore, leading-edge temperature is the most sensitive to changes in coating thickness, and the pressure surface is the least sensitive. The overall cooling effectiveness is less sensitive to changes in the roughness after coating. Increasing the surface roughness, the heat flux reduces at the leading edge and increases at other places. The range of the overall cooling effectiveness rate of the blade rises, and the sensitivity of the overall cooling effectiveness to the coating thickness increases. When Ra reaches 20 μm, the insulation effect with different coating thickness remains unaffected.
KW - Conjugate heat transfer
KW - Cooling performance sensitivity
KW - Surface roughness
KW - Thermal barrier coating thickness
KW - Turbine blades
UR - https://www.scopus.com/pages/publications/85176276859
U2 - 10.1016/j.csite.2023.103727
DO - 10.1016/j.csite.2023.103727
M3 - 文章
AN - SCOPUS:85176276859
SN - 2214-157X
VL - 52
JO - Case Studies in Thermal Engineering
JF - Case Studies in Thermal Engineering
M1 - 103727
ER -