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Acta Aeronautica et Astronautica Sinica ›› 2024, Vol. 45 ›› Issue (13): 630037-630037.doi: 10.7527/S1000-6893.2024.30037

• special column • Previous Articles    

Design and manufacturing method of multi-scale integrated load bearing thin-walled structure for application in next-generation aeroengine based on advanced laser processing technology

Shaoping ZHANG1(), Huiming GUO1, Tong GAO2, Weihong ZHANG2   

  1. 1.AECC Sichuan Gas Turbine Establishment,Chengdu 610500,China
    2.School of Mechanical Engineering,Northwestern Polytechnical University,Xi’an 710072,China
  • Received:2023-12-28 Revised:2024-01-22 Accepted:2024-03-06 Online:2024-07-15 Published:2024-04-10
  • Contact: Shaoping ZHANG E-mail:zhangshaoping@aecc.cn
  • Supported by:
    Defense Industrial Technology Development Program(JCKY2022205B020);National Natural Science Foundation of China(12032018)

Abstract:

The multi-scale structure, composed of the macro skeleton, lattice and micro surface, represents a novel type of structure with potential for high performance, multifunctionality and lightweight design. Advanced laser processing technology not only enhances the manufacturing capacity of high-performance structures, but also provides possibilities for the manufacturing of new complex structures. After providing a brief overview of the current design and manufacturing techniques on macro skeleton, lattice and micro surface, this paper introduces a multi-scale structure design method for advanced laser processing technology. Taking the intermediate case of a turbine engine as an example, the main load-bearing skeleton is designed using topology optimization technology for additive manufacturing. The lightweight lattice design is carried out by filling manufacturable lattice in low-density areas in topology oiptimization or low-stress areas in the optimized model, resulting in a weight reduction of over 20% compared to the original design. Additionally, micro groove structures for drag reduction are designed on the surface of the airflow channel for ultrafast laser etching processing. Simulation results indicate that the micro grooves exhibit a drag reduction effect exceeding 10%. By exploring the multi-scale integrated structure design based on advanced laser processing technology, this study establishes a creative structural design procedure and offers a valuable approach for the development of next-generation aeroengine structures.

Key words: multi-scale structure, topology optimization, lattice structure, additive manufacturing, intermediate case, laser processing

CLC Number: