Abstract
As a new type of thermal protection technology, transpiration cooling plays an important role in the field of aerospace and turbine blade cooling. Due to the complex environment of offshore air intake, a large number of salt spray particles and impurities failed to fully combustion are very easy to adhere to the turbine blades, resulting in the blockage of local cooling air holes, which is not conducive to the thermal protection of the turbine blades. It is essential to quantify the effect of pore blockage on transpiration cooling performance and develop a prediction model. In this study, the performance of perforated plate with round hole cooling channel and tree-like cooling channel is investigated. The results show that the cooling efficiency of the tree-like channel perforated plate is obviously higher under the same coolant mass flow rate and surface outlet area. The effects of injection ratios on the cooling performance of tree-like perforated plates are investigated with three different blockage rates. The results show that the difference of pore blockage on the cooling efficiency of porous plates with tree-like cooling channels is smaller when the coolant injection ratio is lower, and the sensitivity of the overall blockage rate on the effect of transpiration cooling performance increases with the increase of coolant injection ratio.
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Sun, H., Ma, H., Yan, L., Fu, H., Luan, Y., Magagnato, F. (2023). Effect of Pore Blockage on Transpiration Cooling of Marine Turbine Blades. In: Yang, D. (eds) 2023 International Conference on Marine Equipment & Technology and Sustainable Development. METSD 2023. Lecture Notes in Civil Engineering, vol 375. Springer, Singapore. https://doi.org/10.1007/978-981-99-4291-6_45
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DOI: https://doi.org/10.1007/978-981-99-4291-6_45
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