静叶锯齿尾缘控制涡轮宽频噪声的数值研究  

Numerical study of stator serrated trailing-edge to control turbine broadband noise

作　　者：向康深 陈伟杰[1] 连健欣 乔渭阳[1] XIANG Kangshen;CHEN Weijie;LIAN Jianxin;QIAO Weiyang(Turbomachinery Aerodynamics-Aeroacoustics Laboratory,School of Power and Energy,Northwestern Polytechnical University,Xi’an 710129,China)

机构地区：[1]西北工业大学动力与能源学院叶轮机械气动力学与气动声学实验室,西安710129

出　　处：《航空动力学报》2025年第1期467-476,共10页Journal of Aerospace Power

基　　金：国家科技重大专项(2017-Ⅱ-0008-0022);航空发动机及燃气轮机基础科学中心项目(P2022-A-Ⅱ-003-001,P2022-B-Ⅱ-011-001);国家自然科学基金(52106056)。

摘　　要：采用延迟分离涡/声类比(DDES/AA)混合模拟方法,探索了上游静叶“拱形”分布式尾缘(Bionic S)和下游动叶“拱形”分布式前缘(Bionic R)对涡轮湍流尾迹干涉宽频噪声的降噪效果和物理机制。研究发现:在10 kHz以下多数频率下,Bionic S和Bionic R都可以降低湍流尾迹干涉宽频噪声。在此基础上,初步分析了Bionic S尾迹特征和仿生学降噪物理机制。Bionic S可以改变静叶尾迹特征,使其在展向呈现出周期性变化,进一步表现在压力脉动时-空相关系数上的周期性分布,表明仿生学构型极大地增强了不同展向位置压力脉动的相位延迟程度。其影响范围会扩展到尾迹在下游运输过程中与吸力面的整个干涉过程。而本身空间相关系数的“不连续”更说明了未来仿生学构型的降噪研究有必要在三维流动环境中开展。Using delayed detached eddy simulation/analogy acoustics(DDES/AA)hybrid simulation method,the noise reduction effects and physical mechanism of upstream stator with“arch”distributed trailing edge(Bionic S)and downstream rotor with“arch”distributed leading edge(Bionic R)on turbine turbulent wake interaction broadband noise were studied.The research found that,except for individual frequencies,the upstream“arched”trailing edge stator blades(Bionic S)and the downstream“arched”leading edge rotor blades(Bionic R)can reduce the turbulent wake interaction broadband noise at most of frequencies below 10 kHz.Based on this,the wake characteristics and physical mechanism of noise reduction of Bionic S were preliminarily explored.Bionic S can change the characteristics of the stator wake,making it show periodic changes in the span direction,and then periodical distribution of the timespace correlation coefficient of pressure fluctuation,indicating that the bionic configuration greatly enhanced the phase-delay of pressure fluctuation at different spanwise positions.The influence existed in the entire interaction between wake and suction surface during downstream transport.And the discontinuous characteristics of spatial correlation coefficient distribution of the pressure fluctuation showed the necessity of noise reduction study of bionic configuration in the future to be carried out in the three-dimensional flow.

关 键 词：延迟分离涡/声类比(DDES/AA) “拱形” 宽频噪声 压力脉动时-空相关系数 相位延迟 不连续 

分 类 号：V211.6[航空宇航科学与技术—航空宇航推进理论与工程]