Hangkong gongcheng jinzhan (Apr 2022)
Topology Optimization Design of Centrifugal Impeller for Micro Aviation Gas Turbine
Abstract
Centrifual impeller is a key component in micro aviation gas turbine. It is required to reduce the weight of the structure as much as possible on the premise of satisfying the aerodynamic performance. Traditional design and manufacturing technology is basically played to the extreme,but the development of additive manufacturing technology and topology optimization design method has expanded new space for its further optimization design. Aiming at the weight reduction design problem of a certain type of aviation micro gas turbine centrifugal impeller,relying on additive manufacturing and topology optimization design technology,based on the existing design,the static strength analysis of the centrifugal impeller is carried out first,and then the centrifugal impeller topology optimization based on the skeleton model and achievable process design is developed. Finally the optimized model is checked. The results show that the optimized design model can reduce the weight of the centrifugal impeller by 8.7%,and the power-gain ratio of the micro-gas turbine can be further improved,the maximum deformation is reduced by 7.5%. The maximum equivalent stress is reduced by 0.59%,which improves the safety margin of centrifugal impeller when working.
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