| 气动弹片对翼型气动及噪声特性的影响 |
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| 引用本文： | 岳敏楠,李春,郝文星,张俊伟.气动弹片对翼型气动及噪声特性的影响[J].中国机械工程,2019,30(12):1409. |
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| 作者姓名： | 岳敏楠 李春 郝文星 张俊伟 |
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| 作者单位： | 1.上海理工大学能源与动力工程学院，上海，200093
2.上海市动力工程多相流动与传热重点实验室，上海，200093 |
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| 基金项目： | 国家自然科学基金资助项目（51676131，51176129）；
上海市科学技术委员会资助项目（13DZ2260900） |
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| 摘 要： | 在NACA0018翼型吸力面布置固定气动弹片后，比较了原始翼型和弹片翼型的气动性能及噪声特性。采用数值模拟方法，在6°～24°范围内计算攻角气动弹片对翼型气动性能及噪声特性的影响，并分析了其流动控制机理。结果表明：气动弹片在大攻角下的效果较好，升力系数可提高37.11%，且可减缓流动分离向前缘发展，提高气流下洗能力；攻角较大时，气动弹片可以减小翼型在接收点处的噪声总声压级的4.23%，且翼型噪声总声压级在指向性分布上呈现偶极子特性。
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| 关 键 词： | NACA0018翼型 数值模拟 气动弹片 气动性能 噪声特性 |
Effects of Flap on Aerodynamic and Noise Characteristics of Airfoils |
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| YUE Minnan,LI Chun,HAO Wenxing,ZHANG Junwei.Effects of Flap on Aerodynamic and Noise Characteristics of Airfoils[J].China Mechanical Engineering,2019,30(12):1409. |
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| Authors: | YUE Minnan LI Chun HAO Wenxing ZHANG Junwei |
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| Affiliation: | 1. School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093
2. Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai, 200093 |
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| Abstract: | A fixed aerodynamic shrapnel was placed on NACA0018 airfoil suction surface, and the aerodynamic performance and noise characteristics of the original airfoils and the shrapnel airfoils were compared. A numerical simulation method was used to calculate the influences of aerodynamic elastic blades on the aerodynamic performance and noise characteristics of the airfoils when the angle of attack was from 6° to 24°. Results of the flow control mechanism analyses show that the pneumatic shrapnel has better effectiveness at high angle of attack and the lift. The coefficient is increased by 37.11%, the flow separation is slowed forward, and the airflow is improved. When the angle of attack is large, the pneumatic shrapnel may reduce the total sound pressure level of the airfoils at the receiving points, which will be reduced by 4.23%, and the total sound pressure level of the airfoil noise exhibits dipole characteristics in directivity distribution. |
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| Keywords: | NACA0018 airfoil numerical simulation flap aerodynamic performance noise characteristics |
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