波状前缘对水翼湍流干涉噪声的影响 -- 西北工业大学学报,2021,39(6):1266-1273

	论文:2021,Vol:39,Issue(6):1266-1273
	引用本文：
	李芳, 黄桥高, 潘光, 施瑶. 波状前缘对水翼湍流干涉噪声的影响[J]. 西北工业大学学报
	LI Fang, HUANG Qiaogao, PAN Guang, SHI Yao. Effect of wavy leading edge on hydrofoil-turbulence interaction noise[J]. Northwestern polytechnical university

波状前缘对水翼湍流干涉噪声的影响

李芳^1,2, 黄桥高^1,2, 潘光^1,2, 施瑶^1,2

1. 西北工业大学航海学院, 陕西西安 710072;
2. 西北工业大学无人水下运载技术重点实验室, 陕西西安 710072

摘要:

为解决水下噪声污染问题以及提升水下航行器声隐身性能，根据座头鲸鳍肢前缘结节结构对NACA0020进行波状前缘改型设计。采用大涡模拟和FW-H方程相结合的方法，对改型前后翼型的湍流干涉流场及噪声特性进行了研究。结果表明波状前缘能够有效降低翼型的湍流干涉噪声，尤其是高于89.55 Hz的宽频噪声。波状前缘翼型的总声压级指向性特征与原翼型相同，均呈偶极子特性，但其各个方向上的噪声值均有一定降低。对总声压级进行分频段计算发现波状前缘在1 000~5 000 Hz的中高频段内降噪最好，降噪量可达12.6 dB。通过流场分析得出波状前缘的降噪作用主要与前缘压力脉动降低和展向流动增强导致涡在展向的相干性减弱有关。

关键词: 波状前缘湍流干涉噪声大涡模拟 FW-H方程

Effect of wavy leading edge on hydrofoil-turbulence interaction noise

LI Fang^1,2, HUANG Qiaogao^1,2, PAN Guang^1,2, SHI Yao^1,2

1. School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China;
2. Key Laboratory of Unmanned Underwater Vehicle Technology, Northwestern Polytechnical University, Xi'an 710072, China

Abstract:

In order to solve the underwater noise pollution and improve the acoustic stealth performance of underwater vehicles, NACA0020 was bionically modified according to the structure of the leading edge tubercles of humpback fin. The flow field and noise characteristics of the hydrofoil-turbulent interaction model before and after the modification were studied by using the large eddy simulation and the FW-H equation. The results show that the wavy leading edge can effectively reduce the turbulence interaction noise of the hydrofoil, especially the broadband noise after 89.55 Hz. The overall sound pressure level(OASPL) directivity of the wavy leading edge hydrofoil are the same as the original hydrofoil, and both have dipole characteristics, but the noise value in all directions is reduced to a certain extent. The OASPL is calculated and analyzed in different frequency bands. The results show that the OASPL has a best reduction in 1 000-5 000 Hz frequency band, and the noise can be reduced up to 12.6 dB. Through the analysis of flow field, it is concluded that the noise reduction effect of wavy leading edge mainly relates to the decrease in pressure fluctuation at leading edge and the decrease in coherence of vortex in spanwise direction caused by the enhancement of spanwise flow.

Key words: wavy leading edge turbulent interaction noise large eddy simulation FW-H equation

收稿日期: 2021-03-15 修回日期:

DOI: 10.1051/jnwpu/20213961266

基金项目: 国家自然科学基金（51979226）与中央高校基本科研业务费专项基金（3102019HHZY030019，3102020HHZY030018）资助

通讯作者: 黄桥高(1983-),西北工业大学副教授,主要从事水动力学研究。e-mail:huangqiaogao@nwpu.edu.cn Email：huangqiaogao@nwpu.edu.cn

作者简介: 李芳(1992-),女,西北工业大学博士研究生,主要从事水动力学和水下噪声研究。

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