| Citation: | LI Haiwang, ZHANG Dawei, YOU Ruquan. Sensitivity analysis and optimal design of impingement/effusion cooling structural parameters considering thermal stress[J]. Journal of Aerospace Power, 2022, 37（11）：2455-2464 doi: 10.13224/j.cnki.jasp.20220307
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According to the development requirements of efficient cooling and safety and reliability of turbine blades, based on the surrogate model, the sensitivity analysis of the typical structural parameters of the impingement/effusion cooling structure such as injection angle, film plate thickness, impingement distance, spacing distance and diameter ratio of the film and impingement holes, affecting overall cooling effectiveness and maximum thermal stress was performed. Two optimization schemes, maximizing overall cooling effectiveness and simultaneously increasing overall cooling effectiveness and reducing maximum thermal stress, were realized. Results showed that the high thermal stress region appeared near the film cooling holes; the injection angle is the main factor affecting the cooling effectiveness and maximum thermal stress. There was a competitive relationship between the two optimization objectives. The overall cooling effectiveness was increased by 2.9%, and the maximum thermal stress was reduced by 12.5% through multi-objective optimization method.
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