带仿鳍式尾缘结构有限长翼型的噪声特性及降噪实验研究

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带仿鳍式尾缘结构有限长翼型的噪声特性及降噪实验研究

更新时间：2025-07-09

- 带仿鳍式尾缘结构有限长翼型的噪声特性及降噪实验研究
- Issue 9, Pages: 20-27(2022)
- 作者机构：
  
  1. 中国空气动力研究与发展中心气动噪声控制重点实验室
  2. 中国空气动力研究与发展中心设备设计与测试技术研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC： V211.7
- Published：2022
- 稿件说明：
移动端阅览
[J]. 2022, (9): 20-27.
DOI：

[J]. 2022, (9): 20-27. DOI：

摘要

中低雷诺数条件下，翼型绕流时会产生窄带高强度的纯音噪声。为探究仿鳍式尾缘结构对壁面安装形式下有限长翼型产生的纯音噪声的抑制效果，通过实验研究了壁面安装形式下带有高度为2、4、6和8 mm的仿鳍式尾缘结构的有限长NACA0012翼型模型的降噪效果及其噪声特性。在0.55 m×0.4 m声学风洞中测量了不同流速、不同迎角条件下翼型模型的远场传声器信号和传声器阵列信号。远场传声器频谱图和波束形成声源成像图表明：未安装仿鳍式尾缘结构的基础翼型产生了明显的中高频纯音噪声，且纯音噪声的频率随流速的增加向高频移动；仿鳍式尾缘结构可有效降低甚至消除基础翼型产生的纯音噪声，而对其他频带噪声几乎无影响；仿鳍式尾缘结构高度越大降噪效果越好；仿鳍式尾缘结构翼型产生的宽频噪声主要分布在翼型尾缘、叶尖、翼型前缘及尾缘与壁面的连接处，当仿鳍式尾缘结构高度较大时还会在叶尖产生高频噪声。

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