宇航学报 ›› 2014, Vol. 35 ›› Issue (12): 1367-1372.doi: 10.3873/j.issn.1000-1328.2014.12.004

• 飞行器设计与力学 • 上一篇    下一篇

超声速固体粒子侵蚀的欧拉模型

王正之,朱春玲,朱程香,付斌   

  1. 1. 南京航空航天大学航空宇航学院,南京 210016;
    2. 南京航空航天大学飞行器先进设计技术国防重点学科实验室,南京 210016;
    3. 空间物理重点实验室,北京 100076
  • 收稿日期:2013-11-27 修回日期:2014-01-09 出版日期:2014-12-15 发布日期:2014-12-25
  • 基金资助:

    江苏省高校优势学科建设工程自助项目;
    江苏省博士后科研资助计划(1201033C)

Eulerian Model of Solid Particle Erosion at Hypersonic Speed

WANG Zheng zhi, ZHU Chun ling,ZHU Cheng xiang,FU Bin   

  1. 1.College of Aerospace Engineering,Nanjing University of Aeronautics &Astronautics, Nanjing 210016, China;
    2.Key Laboratory of Fundamental Science for National Defense Advanced Design Technology of Flight Vehicle, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China;
    3.Key Laboratory of Space Physics,Beijing 100076, China
  • Received:2013-11-27 Revised:2014-01-09 Online:2014-12-15 Published:2014-12-25

摘要:

利用计算流体力学(CFD)技术,引入粒子容积分数的概念,基于欧拉两相流模型,计算超声速飞行器侵蚀表面粒子速度和容积分数分布,模拟侵蚀后的三维表面外形。以超声速计算结果为基础,针对现有拉格朗日法计算侵蚀后退率的局限性,推导出适用于欧拉模型的计算公式。采用本文的数值模拟方法,模拟侵蚀后飞行器的外形,并与实验结果进行对比,验证了本文方法的正确性。计算和分析了不同环境参数对侵蚀量的影响,结果表明,马赫数和粒子容积分数对侵蚀量有较大影响,而粒子容积分数不变的情况下,粒子直径对侵蚀量影响不大。

关键词: 粒子侵蚀, 超声速飞行器, 粒子容积分数, 数值模拟, 计算流体力学

Abstract:

In order to simulate vehicle erosion under hypersonic conditions, the method of computational fluid dynamics (CFD) technique is used. Based on Eulerian two phase flow model, the concept of particle volume fraction is set up and the equations of solid particles distribution are derived. Hypersonic flow fields and distribution of particle volume fraction are calculated as the basis of numerical simulation. The erosion calculation formula based on the Lagrange method has its limitations; therefore, a new formula of erosion amount suitable for Eulerian model is derived. The erosion amount of model is simulated by using the above mentioned computational method, and the calculated results are compared with experimental results in order to verify the validity of the method. The effects of environment parameters on the erosion are studied. The calculated results show that Mach number and particle volume fraction have great influence on the erosion amount, and particle diameter has almost no effect on the erosion amount when particle volume fraction remains unchanged.

Key words: Particle erosion, Hypersonic vehicle, Particle volume fraction,, Numerical simulation, Computational fluid dynamics (CFD)

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