Abstract: Aiming at the problems of single function and low utilization rate of internal space of common guide vane,a new aeroacoustic guide vane was designed in a wind tunnel,the shape structure and installation parameters of the aeroacoustic guide vane were determined,and the flow field characteristics and anechoic performance of the guide vane were studied by using Fluid Dynamics numerical Calculation (CFD) and acoustic characteristic analysis.The research showed that the aeroacoustic deflector adopted double circular arc airfoil and was installed with 8 oblique angles of 48°(the included angle between the chord direction and the incoming flow direction of the deflector) by considering the influence of pressure loss,flow field quality and aerodynamic noise.The pressure loss was reduced by 68%,the corner vortex was eliminated,and the flow field quality was obviously improved.The inside of the deflector was filled with glass silk cotton with a density of 32kg/m3.The pore diameter of the perforated plate was 2mm,the perforation rate was 0.2,and the noise absorption was reached 13dB,which ensured the feasibility of the design.

Key words: fluid dynamics numerical calculation, guide vane, pressure loss, flow field quality, aerodynamic noise, arc airfoil

摘要： 针对普通导流片功能单一,内部空间利用率低等问题,在某风洞中设计新型气动声学导流片,确定气动声学导流片的外形结构和安装参数,运用流体力学数值计算(CFD)与声学特性分析,对其进行流场特性和消声性能研究。研究表明,综合考虑压力损失、流场品质和气动噪声的影响,气动声学导流片采用双圆弧翼型,设置8片斜角48°(导流片弦向与来流方向的夹角)安装;压力损失降低了68%,消除了拐角涡流,流场品质明显提高;导流片内部填充密度为32 kg/m3的玻璃丝棉,穿孔板孔径取2 mm、穿孔率取0.2,噪声吸收量可达13 dB,保证了设计上的可行性。

关键词: 流体力学数值计算, 导流片, 压力损失, 流场品质, 气动噪声, 圆弧翼型