北京航空航天大学学报 ›› 2007, Vol. 33 ›› Issue (01): 14-17.

• 论文 • 上一篇    下一篇

跨声风扇转子的BVF气动优化方法

吴宏, 李秋实, 郭明, 周盛   

  1. 北京航空航天大学 航空发动机气动热力重点实验室, 北京 100083
  • 收稿日期:2005-12-23 出版日期:2007-01-31 发布日期:2010-09-19
  • 作者简介:吴 宏(1982-),男,江西南昌人,博士生,whbuaa@sjp.buaa.edu. cn.
  • 基金资助:

    国家自然科学基金资助项目(10577002)

Aerodynamic optimization method of transonic fan rotor based on BVF

Wu Hong, Li Qiushi, Guo Ming, Zhou Sheng   

  1. National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2005-12-23 Online:2007-01-31 Published:2010-09-19

摘要: 将加功量作为目标函数并结合边界涡量流BVF (Boundary Vorticity Flux)这 个诊断因子,对某高性能跨声风扇转子进行了优化.通过基于局部动力学的BVF诊断可以捕 捉到流场分离流动在叶片表面上的物理根源,可以清晰的显示出激波结构.尽管优化后加功 量增大,但因为BVF分布改善,激波结构和分离流动被良好地控制.三维粘性N-S(Navier-S tokes)程序计算结果表明,风扇转子在近峰值效率工况下压比提高了7.69%,效率提高了1.9 2%,在全工况范围转子性能都得到了较大提升.基于BVF诊断的优化手段在风扇/压气机的优 化中可起到很大的作用.

Abstract: The aerodynamic optimization of a transonic fan rotor was implemented by controlling the BVF(boundary vorticity flux) distribution on rotor blade. A novel objective function of torque associated with BVF was used to optimize the blade configuration. The physical sources of separated flow could be probed on r otor blade through the BVF diagnosis, which was a novel diagnosis method based o n local dynamics. The shock structure was showed clearly on the rotor blade in th is diagnosis method. Although the torque of the optimized rotor was increased, t he shock strength was decreased and the separated flow was controlled better, as the BVF distribution was better than before. The results of 3D CFD(computationa l fluid dynamics) analysis indicate that not only the total pressure ratio of r otor is increased by 7.69%, but also the adiabatic efficiency is increased by 1 .92% too. The optimized rotor has a higher performance over a wide range of mass flow. The optimization method based on BVF can play an important role in the optimization design of fans/compressors.

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