Volume 30 Issue 2
Feb.  2015
Turn off MathJax
Article Contents
XU Kun-bo, QIAO Wei-yang, JI Liang, CHEN Wei-jie. Experiment on noise reduction physical mechanism of serrated trailing edge structure[J]. Journal of Aerospace Power, 2015, 30(2): 463-472. doi: 10.13224/j.cnki.jasp.2015.02.026
Citation: XU Kun-bo, QIAO Wei-yang, JI Liang, CHEN Wei-jie. Experiment on noise reduction physical mechanism of serrated trailing edge structure[J]. Journal of Aerospace Power, 2015, 30(2): 463-472. doi: 10.13224/j.cnki.jasp.2015.02.026

Experiment on noise reduction physical mechanism of serrated trailing edge structure

doi: 10.13224/j.cnki.jasp.2015.02.026
  • Received Date: 2013-09-04
  • Publish Date: 2015-02-28
  • Basic characteristics of wake turbulence flow field of airfoils with serrated trailing edge and straight trailing edge were comparatively analyzed, and noise of two trailing edge structure was measured through line array method. The results show that the turbulence intensity of wake turbulence flow field and turbulence intensity in three directions of airfoil with serrated trailing edge are significantly reduced compared with airfoil with straight trailing edge. The noise field results show that trailing edge noise has a huge decrease on airfoil with serrated trailing edge, while the leading edge noise is nearly the same. Serrated structure widens the wake region and accelerates the breakdown of large vortex, resulting in additional horseshoe vortex. Turbulence decay rate along the flow direction becomes larger.

     

  • loading
  • [1]
    Finez A,Roger M,Jondeau E,et al.Broadband noise reduction of linear cascades with trailing edge serrations[R].AIAA-2011-2874,2011.
    [2]
    Brooks T F,Hodgson T H.Trailing edge noise prediction from measured surface pressures[J].Journal of Sound and Vibration,1981,78(1):69-117.
    [3]
    Howe M S.Trailing edge noise at low Mach numbers[J].Journal of Sound and Vibration,1999,225(2):211-238.
    [4]
    Howe M S.Trailing edge noise at low Mach numbers:Part 2 attached and separated edge flows[J].Journal of Sound and Vibration,2000,234(5):761-775.
    [5]
    Amiet R K.Noise due to turbulent flow past a trailing edge[J].Journal of Sound and Vibration,1976,47(3):387-393.
    [6]
    Lilley G M.A study of the silent flight of the owl[R].AIAA 98-2340,1998.
    [7]
    Roger M,Moreau S.Back-scattering correction and further extensions of Amiet's trailing-edge noise model:Part Ⅰ theory[J].Journal of Sound and Vibration,2005,286(3):477-506.
    [8]
    Moreau S,Roger M.Back-scattering correction and further extensions of Amiet's trailing-edge noise model:Part Ⅱ application[J].Journal of Sound and Vibration,2009,323(1):397-425.
    [9]
    Chong T P,Joseph P,Gruber M.On the noise and wake flow of an airfoil with broken and serrated trailing edges[R].AIAA-2011-2860,2011.
    [10]
    Finez A,Jondeau E,Roger M,et al.Broadband noise reduction with trailing edge brushes[R].AIAA-2010-3980,2010.
    [11]
    Gruber M,Joseph P,Chong T P.On the mechanisms of serrated airfoil trailing edge noise reduction[R].AIAA-2011-2781,2011.
    [12]
    Gruber M,Azarpeyvand M,Joseph P.Airfoil trailing edge noise reduction by the introduction of sawtooth and slitted trailing edge geometries[R].Sydney:20th International Congress on Acoustics,2010.
    [13]
    Gruber M,Joseph P,Chong T P.Experimental investigation of airfoil self noise and turbulent wake reduction by the use of trailing edge serrations[R].Stockholm,Sweden:16th AIAA/CEAS Aeroacoustics Conference,2010.
    [14]
    Jones L E,Sandberg R D.Direct numerical simulations of noise generated by the flow over an airfoil with trailing edge serrations[R].AIAA-2009-3195,2009.
    [15]
    Howe M S.Aerodynamic noise of a serrated trailing edge[J].Journal of Fluids and Structures,1991,5(1):33-45.
    [16]
    Howe M S.Noise produced by a sawtooth trailing edge[J].The Journal of the Acoustical Society of America,1991,90(1):482-487.
    [17]
    Howe M S.A review of the theory of trailing edge noise[J].Journal of Sound and Vibration,1978,61(3):437-465.
    [18]
    Howe M S.On the generation of side-edge flap noise[J].Journal of Sound and Vibration,1982,80(4):555-573.
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (1588) PDF downloads(851) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return