航空学报 > 2024, Vol. 45 Issue (21): 230116-230116   doi: 10.7527/S1000-6893.2024.30116

基于多分辨率SPH-FEM耦合方法的鸟撞问题数值模拟

马明瑞1, 陈福振1,2(), 严红1,2, 刘凡1,2   

  1. 1.西北工业大学 动力与能源学院,西安 710129
    2.西北工业大学 太仓长三角研究院,太仓 215400
  • 收稿日期:2024-01-05 修回日期:2024-01-30 接受日期:2024-02-23 出版日期:2024-11-15 发布日期:2024-03-14
  • 通讯作者: 陈福振 E-mail:chenfuzhen@nwpu.edu.cn
  • 基金资助:
    陕西省重点研发计划(2022SF-151);太仓市科技计划(TC2022JC10)

Numerical simulation of bird strike based on multi-resolution SPH-FEM coupling method

Mingrui MA1, Fuzhen CHEN1,2(), Hong YAN1,2, Fan LIU1,2   

  1. 1.School of Power and Energy,Northwestern Polytechnical University,Xi’an  710129,China
    2.Yangtze River Delta Research Institute of NPU,Northwestern Polytechnical University,Taicang  215400,China
  • Received:2024-01-05 Revised:2024-01-30 Accepted:2024-02-23 Online:2024-11-15 Published:2024-03-14
  • Contact: Fuzhen CHEN E-mail:chenfuzhen@nwpu.edu.cn
  • Supported by:
    Key Research and Development Plan of Shaanxi Province(2022SF-151);Science and Technology Plan of Taicang City(TC2022JC10)

摘要:

本文针对航空发动机风扇叶片鸟撞问题的数值模拟方法研究,提出了一种考虑有限单元自适应生成的多分辨率SPH-FEM耦合方法。首先,新方法通过在FEM单元内部插值点处设置一组背景粒子,克服了传统SPH-FEM耦合方法在耦合界面处对模型离散尺度的一致性要求;其次,新方法在传统有限元算法的基础上加入单元自适应生成算法和无反射边界条件,将计算过程中对模型所有单元的求解转变为对关键区域的部分单元进行求解,降低了计算成本。文章应用所建立的新耦合方法开展了多结构鸟体撞击航空发动机风扇叶片的数值模拟研究,分析了撞击的动态响应,揭示了叶片受鸟撞过程的损伤机理,对航空发动机风扇叶片抗鸟撞设计和提高飞行安全性具有重要意义。

关键词: 航空发动机, 风扇叶片, SPH-FEM, 鸟撞, 飞行安全

Abstract:

To study the problem of bird strike on aero-engine fan blades, this paper proposes a multi-resolution SPH-FEM coupling method considering adaptive generation of finite elements. Firstly, by setting a group of background particles at the interpolation points inside the FEM elements, the new method overcame the problem of consistency requirement of model discrete scale at the coupling interface in the traditional SPH-FEM coupling method. Secondly, by adding an element adaptive generation algorithm and applying the non-reflecting boundary condition, the new method changed the calculation range from all elements to elements at critical areas, reducing computational costs. Using this new coupling method, this study conducted numerical simulations of bird strikes on areo-engine fan blades, analyzed the dynamic response during the impact process, and revealed the damage mechanisms of fan blades under the condition of bird strikes. It is of important significance for the design of bird strike resistance for aero-engine fan blades and the improvement of flight safety.

Key words: aero-engine, fan blade, SPH-FEM, bird strike, flight safety

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