航空学报 > 2019, Vol. 40 Issue (10): 123007-123007   doi: 10.7527/S1000-6893.2019.23007

前缘侵蚀对风扇转子叶片气动特性的影响机理

史磊, 杨光, 林文俊   

  1. 中国民航大学 中欧航空工程师学院, 天津 300300
  • 收稿日期:2019-03-15 修回日期:2019-04-15 出版日期:2019-10-15 发布日期:2019-05-22
  • 通讯作者: 史磊 E-mail:star704nwpu@126.com
  • 基金资助:
    中央高校基本科研业务费中欧专项(3122018Z001)

Influence mechanism of leading-edge erosion on aerodynamic performance of fan rotor blade

SHI Lei, YANG Guang, LIN Wenjun   

  1. Sino-European Institute of Aviation Engineering, Civil Aviation University of China, Tianjin 300300, China
  • Received:2019-03-15 Revised:2019-04-15 Online:2019-10-15 Published:2019-05-22
  • Supported by:
    the Fundamental Research Funds of SIAE for the Central Universities (3122018Z001)

摘要: 以某小型大涵道比涡扇发动机风扇转子作为研究目标,数值模拟了航空发动机风扇转子叶片在航线运行过程中受到侵蚀效应后的气动特性衰变情况,为后续的精细化维修奠定理论基础。风扇转子叶片侵蚀后,叶片前缘将逐步蜕变为钝头叶型并且伴随有明显的表面粗糙度。为了简化研究,假设侵蚀后的转子叶片前缘粗糙度均匀分布,分别计算了前缘粗糙度为120 μm、250 μm两种前缘侵蚀程度下的风扇转子特性。研究结果表明,风扇转子峰值效率相比于原型叶片依次下降了1.63%和2.39%。当前缘粗糙度为250 μm时,风扇转子叶片吸力面前缘近壁面极限流线有分离迹线产生,出口平均马赫数下降2.03%。

关键词: 风扇转子, 前缘侵蚀, 弦长变化, 粗糙度, 性能衰退

Abstract: In this paper, a small large bypass ratio turbofan engine fan rotor is taken as the research target. The aerodynamic characteristics decay of the aero-engine fan rotor blades during the flight process are numerically studied, laying a theoretical foundation for the subsequent refined maintenance. After the fan rotor blade is eroded, the leading-edge of the blade will gradually become blunt-headed with pronounced surface roughness. To simplify the research, this paper assumes that the roughness of the leading-edge of the rotor blade after erosion is evenly distributed, and the rotor characteristics of the leading-edge roughness with 120 μm and 250 μm are calculated. The results show that the peak efficiency of the fan rotor is reduced by 1.63% and 2.39% compared with the prototype blade. When the leading-edge roughness is 250 μm, there is a separation trace on the near-wall limit streamlines of the front edge of the fan rotor blade suction, and the average Mach number of the outlet decreases by 2.03%.

Key words: fan rotor, leading-edge erosion, chord length change, roughness, performance degradation

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