.png){kind=icon}
.png){kind=icon}
Return
Study on the influence of key structural parameters of turbine heat shields on the thermal load of bearing shell
.png){kind=icon}
OA
AI
C
G
Z
S
DOI：10.1016/j.csite.2025.106108.png)
.png){kind=icon}
.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Increasing engine power outputs have raised exhaust gas temperatures, intensifying thermal stresses on turbine systems and compromising bearing reliability through accelerated seal ring degradation and oil coking. Heat shields installed between turbines and bearings mitigate heat transfer, with their insulation efficiency critically dependent on structural parameters and assembly configurations. This study employs experimental testing and multi-physics simulations to analyze how heat shield inner rim designs (open vs. closed states) and diameter affect thermal insulation. Numerical models demonstrated strong alignment with experimental data across bearing housing measurement points, validating their accuracy. Results showed that closed inner rim configurations reduced temperatures at critical bearing locations-specifically the turbine-end sealing ring, oil inlet wall, and turbine-end floating bearing-by 11.2-16.0 K, 6.3-7.1 K, and 3.8-6.9 K, respectively, compared to open configurations. Additionally, reducing the inner rim diameter provided further temperature reductions of approximately 2 K at these locations. The combined effects of minimized inner rim diameters and closed-edge designs yielded optimal thermal insulation, effectively attenuating heat flux propagation to bearing systems. These findings underscore the importance of geometric optimization in thermal shield design, offering actionable strategies to enhance component durability under extreme thermal loads.
Keywords:
Turbocharger
Bearing house
Heat shield
Convection heat transfer
Thermal insulation
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
IF:
6.4
Papers:
8.0K
Citations:
2.6W
Organization
Cited Papers