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离心叶轮气动阻尼的数值分析

肖军 杨启超 王乐

肖军, 杨启超, 王乐. 离心叶轮气动阻尼的数值分析[J]. 航空动力学报, 2018, 33(9): 2129-2138. doi: 10.13224/j.cnki.jasp.2018.09.010
引用本文: 肖军, 杨启超, 王乐. 离心叶轮气动阻尼的数值分析[J]. 航空动力学报, 2018, 33(9): 2129-2138. doi: 10.13224/j.cnki.jasp.2018.09.010
Numerical analysis of aerodynamic damping for centrifugal impeller[J]. Journal of Aerospace Power, 2018, 33(9): 2129-2138. doi: 10.13224/j.cnki.jasp.2018.09.010
Citation: Numerical analysis of aerodynamic damping for centrifugal impeller[J]. Journal of Aerospace Power, 2018, 33(9): 2129-2138. doi: 10.13224/j.cnki.jasp.2018.09.010

离心叶轮气动阻尼的数值分析

doi: 10.13224/j.cnki.jasp.2018.09.010
基金项目: 国家青年科学基金(51405130)

Numerical analysis of aerodynamic damping for centrifugal impeller

  • 摘要: 为进行运动边界下离心叶轮流场的数值分析,独立开发了网格变形程序和非定常流动分析程序,实现了流场中振动离心叶轮的气动阻尼计算。采用紧支撑径向基函数法进行结构到气动表面变形的数据传递,应用二叉树技术进行壁面距离的计算,大幅提高了网格变形和流场分析中距离搜索的计算效率。通过振动叶栅和离心叶轮的算例,验证了程序应用于运动边界流场计算和叶轮流场模拟的正确性。以某离心叶轮为对象,展开其模态气动阻尼比的计算分析。结果表明:考察的两个模态下气动阻尼比均为正值,小幅振动下模态气动阻尼比与振幅无关,轮盘振动模态下叶轮的气动阻尼比随工况接近失速而逐渐减小。

     

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出版历程
  • 收稿日期:  2017-03-31
  • 刊出日期:  2018-09-28

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