A shear layer phase shift correction method based on simplified ray model
-
摘要: 给出了基于简化射线模型的三维有限厚度风洞剪切层相位修正方法,利用数值模拟结果对该方法的物理依据进行了解释,并将其与传统的Amiet方法和平均马赫数法进行了对比研究,通过风洞试验对简化射线法的有效性进行了验证,最后给出了简化射线法对空间弯曲的剪切层的相位修正方法。结果表明:在来流马赫数小于等于0.3、测量角在40°~140°的范围内,当声源和传声器在同一个平面内时,对于风洞剪切层引起声波相位畸变修正,简化射线法、平均马赫数法和Amiet方法之间没有明显的差别,三种方法之间的相对误差小于1%。Abstract: A shear layer phase shift correction method for three-dimensional finite thickness wind tunnel based on simplified ray model was presented. And its physical basis was explained with the help of numerical simulation. A comparison of the simplified ray model with Amiets method and average Mach number method was given. The presented simplified shear layer correction method was validated experimentally using a microphone array to localize an inflow source. Lastly, the curved shear layer phase shift correction method using the simplified ray method was given. It was found that if inflow Mach number was less than and equal to 0.3 and measurement angle ranged from 40° to 140°, when the source and mircophones were on the same plane, the difference between the three correction methods was less than 1%.
-
[1] 许坤波,乔渭阳,纪良,等.尾缘锯齿结构的降噪物理机制实验[J].航空动力学报,2015,30(2):463-472.XU Kunbo,QIAO Weiyang,JI Liang,et al.Experiment on noise reduction physical mechanism of serrated trailing edge structure[J].Journal of Aerospace Power,2015,30(2):463-472.(in Chinese) [2] 王勋年,李征初,陈正武,等.声学风洞内气动噪声源识别定位方法研究[J].空气动力学学报,2012,30(3):284-290.WANG Xunnian,LI Zhengchu,CHEN Zhengwu,et al.Researching on aerodynamic noise sources identification technology in anechoic wind tunnel[J].Acta Aerodynamica Sinca,2012,30(3):284-290.(in Chinese) [3] AMIET R K.Correction of open jet wind tunnel measurements for shear layer refraction[R].AIAA 75-532,1975. [4] AMIET R K.Refraction of sound by a shear layer[J].Journal of Sound and Vibration,1978,58(4):467-482. [5] AHUJA K K,TANNA H K,TESTER B J.An experimental study of transmission,reflection and scattering of sound in a free jet flight simulation facility and comparison with theory[J].Journal of Sound and Vibration,1981,75(1):51-85. [6] MORFEY C L,TESTER B J.Noise measurements in a free jet flight simulation facility:shear layer refraction and facility-to-flight corrections[J].Journal of Sound and Vibration,1977,54(1):83-106. [7] MORFEY C L,JOSEPH P F.Shear layer refraction corrections for off-axis sources in a jet flow[J].Journal of Sound and Vibration,2001,239(4):819-848. [8] WANG Yigang,YANG Jiashun,JIA Qing,et al.An improved correction method for sound source drift in a jet flow and its application to a wind tunnel measurement[J].Acta Acustica United with Acustica,2015,101(3):642-649. [9] EWERT R,KORNOW O,TESTER B J,et al.Spectral broadening of jet engine turbine tones[R].AIAA-2008-2940,2008. [10] EWERT R,KORNOW O,DELFS J W,et al.A CAA based approach to tone haystacking[R].AIAA-2009-3217,2009. [11] JIAO Jin,DELFS J W,DIERKE J.Towards CAA based acoustic wind tunnel corrections for realistic shear layers[R].AIAA-2015-3278,2015. [12] OERLEMANS S.Detection of aeroacoustic sound sources on aircraft and wind turbines[D].Enschede,Dutch:University of Twente,2009. [13] ZHANG Jun,ZENG Xinwu.A transient axial solution for the reflection of a spherical acoustic wave from a rigid parabolic reflector[J].Acta Acustica United with Acustica,2013,99(6):867-875. [14] SULAIMAN Z.Effect of open-jet shear layers on aeroacoustic wind tunnel measurements[D].Delft,Ducth:Delft University of Technology,2011. [15] 张俊龙,李征初,卢翔宇.开口风洞剪切层对传声器及其阵列测量影响试验研究[J].实验流体力学,2018,32(1):71-78.ZHANG Junlong,LI Zhengchu,LU Xiangyu.Experiment research on the influence of open jet shear layer on microphone and microphone array measurement[J].Journal of Experiments in Fluid Mechanics,2018,32(1):71-78.(in Chinese) [16] HUMPHREYS W M,BROOKS T F,HUNTER W W,et al.Design and use of microphone directional array for aeroa coustic measurements[R].AIAA 98-0471,1998.
点击查看大图
计量
- 文章访问数: 529
- HTML浏览量: 1
- PDF量: 500
- 被引次数: 0