某大涵道比涡扇发动机风扇激波噪声降噪设计
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摘要
为了研究民用大涵道比涡扇发动机风扇叶片弯掠造型对风扇激波噪声的影响,本文在基准风扇叶型的基础上,增大风扇叶片尖部前掠,加宽风扇叶片中下部和根部,设计了一种改型风扇叶片,并对基准风扇和改型风扇的前缘脱体激波噪声的一维传播特性进行了对比分析。结果表明,在海平面标准大气条件起飞工况和最大爬升工况下,改型风扇的激波噪声水平较基准风扇叶型低,证明该风扇叶型的弯掠改型设计有助于降低风扇激波噪声。
In order to investigate the effect of sweep and lean fan blade profile on fan shock wave noise of the high bypass ratio turbofan engine, a modified fan blade was designed by increasing the sweep of fan blade tip and widening the middle and lower parts and roots of fan blade on basis of reference fan blade profile. Then the 1 D propagation characteristics of detached shock wave noise in the leading edge of reference fan and modified fan were analyzed. The results show that the shock wave noise level of the modified fan is lower than that of the reference fan at the conditions of takeoff at ISA sea level and maximum climb, which proves that the modified design of the sweep and lean fan blade profile is helpful to reduce the shock wave noise of the fan.
In order to investigate the effect of sweep and lean fan blade profile on fan shock wave noise of the high bypass ratio turbofan engine, a modified fan blade was designed by increasing the sweep of fan blade tip and widening the middle and lower parts and roots of fan blade on basis of reference fan blade profile. Then the 1 D propagation characteristics of detached shock wave noise in the leading edge of reference fan and modified fan were analyzed. The results show that the shock wave noise level of the modified fan is lower than that of the reference fan at the conditions of takeoff at ISA sea level and maximum climb, which proves that the modified design of the sweep and lean fan blade profile is helpful to reduce the shock wave noise of the fan.
引文
[1]乔渭阳.航空发动机气动声学[M].北京:北京航空航天大学出版社,2010.Qiao Weiyang.Aeroacoustics of aero engine[M].Beijing:Beijing University of Aeronautics and Astronautics Press,2010(in Chinese)
[2]Goldstein A W,Glaser F W,Coats J W.Acoustic properties of a supersonic fan:NASATN D-7096[R].Washington:NASA,1973.
[3]陈鹏,李晓东.航空发动机进气道内激波噪声的预测[C]//中国工程热物理学会第十一届学术会议.北京:中国工程热物理学会,2005:670-676.Chen Peng,Li Xiaodong.Fan shock wave noise prediction of turbo engine[C]//The Proceedings of 11th Academic Conference of Chinese Society of Engineering Thermophysics.Beijing:Chinese Society of Engineering Thermophysics,2005:670-676(in Chinese)
[4]Stratford B S,Newby D R.A new look at the generation of buzz-saw noise:AIAA 77-1343[R].Reston:AIAA,1977.
[5]McAlpine A,Fisher J.On the prediction of"buzz-saw"noise in aero-engine inlet ducts[J].Journal of Sound and Vibration2001,248(1):123-149.
[6]McAlpine A,Fisher J.On the prediction of"buzz-saw"noise in acoustically lined aero-engine inlet ducts[J].Journal of Sound and Vibration,2003,265(1):175-200.
[7]McAlpine A,Fisher J."buzz-saw"noise:A comparison of measurement with prediction[J].Journal of Sound and Vibration,2006,290(3-5):1202-1233.
[8]McAlpine A,Fisher J."buzz-saw"noise:A comparison of modal measurements with an improved prediction method[J]Journal of Sound and Vibration,2007,306(3-5):419-443.
[9]Fisher M J,Tester B J,Schwaller P J G.Supersonic fan tone noise prediction:AIAA 98-2249[R].Reston:AIAA,1998.
[10]McAlpine A,Fisher M J.The effect of acoustic lining on"buzzsaw"noise generated by an aero-engine:AIAA 2001-2201[R]Reston:AIAA,2001.
[2]Goldstein A W,Glaser F W,Coats J W.Acoustic properties of a supersonic fan:NASATN D-7096[R].Washington:NASA,1973.
[3]陈鹏,李晓东.航空发动机进气道内激波噪声的预测[C]//中国工程热物理学会第十一届学术会议.北京:中国工程热物理学会,2005:670-676.Chen Peng,Li Xiaodong.Fan shock wave noise prediction of turbo engine[C]//The Proceedings of 11th Academic Conference of Chinese Society of Engineering Thermophysics.Beijing:Chinese Society of Engineering Thermophysics,2005:670-676(in Chinese)
[4]Stratford B S,Newby D R.A new look at the generation of buzz-saw noise:AIAA 77-1343[R].Reston:AIAA,1977.
[5]McAlpine A,Fisher J.On the prediction of"buzz-saw"noise in aero-engine inlet ducts[J].Journal of Sound and Vibration2001,248(1):123-149.
[6]McAlpine A,Fisher J.On the prediction of"buzz-saw"noise in acoustically lined aero-engine inlet ducts[J].Journal of Sound and Vibration,2003,265(1):175-200.
[7]McAlpine A,Fisher J."buzz-saw"noise:A comparison of measurement with prediction[J].Journal of Sound and Vibration,2006,290(3-5):1202-1233.
[8]McAlpine A,Fisher J."buzz-saw"noise:A comparison of modal measurements with an improved prediction method[J]Journal of Sound and Vibration,2007,306(3-5):419-443.
[9]Fisher M J,Tester B J,Schwaller P J G.Supersonic fan tone noise prediction:AIAA 98-2249[R].Reston:AIAA,1998.
[10]McAlpine A,Fisher M J.The effect of acoustic lining on"buzzsaw"noise generated by an aero-engine:AIAA 2001-2201[R]Reston:AIAA,2001.