上海交通大学学报

上海交通大学学报（自然版） ›› 2013, Vol. 47 ›› Issue (11): 1783-1789.

• 能源与动力工程 • 上一篇    下一篇

静叶倾角对动静干涉声学特性的影响

刘海建a，欧阳华a，田杰a，吴亚东b，杜朝辉a
  

  1. （上海交通大学 a.机械与动力工程学院; b.航空航天学院， 上海 200240）
     
  • 收稿日期:2012-11-25
  • 基金资助:

    国家自然科学基金资助项目(11202132,51076101)

Analysis of Vane Lean Effect for Rotor-stator Interaction

LIU Haijiana,OUYANG Huaa,TIAN Jiea,WU Yadongb,DU Zhaohuia
  

  1. （a.School of Mechanical Engineering；  b.School of Aeronautics and Astronautics, Shanghai Jiaotong University, Shanghai 200240, China）
  • Received:2012-11-25

摘要：

为了有效降低航空发动机动静干涉噪声，采用试验和理论分析不同周向倾斜静叶与动叶干涉产生的气动及声学特性.对静叶倾角为-25° ~ 25°的声学测量结果表明，影响总声压级的主要因素为单音噪声，其中一阶单音占主导；在静叶倾角为-10° ~ 10°时一阶单音噪声占总声压级比例超过40%.通过对静叶倾角±25°及0°的数值计算分析可知，改变静叶倾角可以调整动叶尾迹相位分布，从而影响动叶尾迹与静叶的干涉效果，达到控制噪声的目的.后倾静叶要优于前倾，与试验结果一致.
 
 

关键词: 动静干涉, 宽频噪声, 单音噪声, 相位

Abstract:

The stator with different lean angles was acoustically tested at design condition to get the free field noise spectrum. Besides, the broadband and tone part were extracted from the spectrum. Then, the stator with three lean angles was employed for numerical study to obtain the  wake evolution of the rotor and the RMS pressure at the  surface of the rotor. The results indicate that the stator with different lean angles can change the phase of the wake of the rotor. The first harmonic of tone noise causes the difference in the total SPL, and the stator with the backward lean angle has a better tone noise reduction effect than the  forward one both for the tone SPL and total SPL.
 

Key words: rotor-stator interaction, broadband noise, tone noise, phase

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