基于谱元法的流体-声学整体模拟,用于解决低雷诺数下流经开槽圆筒的问题

IF 1.4 4区 物理与天体物理 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
AIP Advances Pub Date : 2024-09-10 DOI:10.1063/5.0215719
Ya Zhuo, Guoliang Qin, Ximeng Ye
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引用次数: 0

摘要

气缸周围的气流产生的空气动力噪音是航空和风能工程中的一项重大工程挑战。流动中的交替涡流脱落现象会导致振动和噪声的产生。然而,由于流场和声场在大小上存在显著差异,准确描述流场和声场具有挑战性。为解决这一问题,本研究介绍了应用谱元法(SEM)和流声单片模拟来求解低雷诺数下的二维可压缩纳维-斯托克斯方程。本研究旨在探讨通过在圆筒上实施开槽技术来降低流动引起的噪声。本研究重点考察两种不同的狭缝宽度比,即 s/d = 0.15 和 0.25,狭缝攻角为 0°。对完整圆筒和开槽圆筒进行了比较分析。研究结果表明,与完整圆筒相比,开槽圆筒的涡流脱落强度降低,下游涡流生成区域扩大。值得注意的是,当 s/d = 0.25 时,开槽圆柱体产生的噪声最小。即使在 s/d = 0.15 时,也能观察到流动引起的噪声显著降低。这些结果凸显了在气缸上利用开槽技术有效降低气动噪声的潜力。扫描电子显微镜和流动声学整体模拟的应用表明,它们在分析和设计空气动力学噪声缓解技术方面具有重要意义。这项工作可以开发创新的解决方案,以降低噪声并提高航空和风能工程中各种应用的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fluid-acoustic monolithic simulation based on spectral element method to solve flows past a slotted circular cylinder at low Reynolds numbers
Aerodynamic noise resulting from the flow around cylinders is a significant engineering challenge in aviation and wind engineering. The phenomenon of alternating vortex shedding in the flow leads to vibration and noise generation. However, accurately describing both the flow field and the sound field is challenging due to the significant difference in magnitude between them. To tackle this issue, this work introduces the application of the spectral element method (SEM) and flow-acoustic monolithic simulation for solving the two-dimensional compressible Navier–Stokes equations at low Reynolds numbers. This study is to investigate the reduction of flow-induced noise through the implementation of slotting technology on a circular cylinder. This study focuses on examining two different slit width ratios, s/d = 0.15 and 0.25, with a slit angle of attack of 0°. A comparative analysis is conducted between a complete circular cylinder and a slotted circular cylinder. The findings indicate that the slotted cylinder exhibits reduced intensity of vortex shedding and an extended region of downstream vortex generation compared to the complete cylinder. Notably, when s/d = 0.25, the slotted cylinder demonstrates minimal noise generation. Even at s/d = 0.15, a significant reduction in flow-induced noise is observed. These results highlight the potential of utilizing slotting technology on cylinders to effectively mitigate aerodynamic noise. The application of SEM and flow-acoustic monolithic simulation shows their relevance in analyzing and designing noise mitigation techniques in aerodynamics. This work can develop innovative solutions to reduce noise and improve the performance of various applications in aviation and wind engineering.
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来源期刊
AIP Advances
AIP Advances NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
2.80
自引率
6.20%
发文量
1233
审稿时长
2-4 weeks
期刊介绍: AIP Advances is an open access journal publishing in all areas of physical sciences—applied, theoretical, and experimental. All published articles are freely available to read, download, and share. The journal prides itself on the belief that all good science is important and relevant. Our inclusive scope and publication standards make it an essential outlet for scientists in the physical sciences. AIP Advances is a community-based journal, with a fast production cycle. The quick publication process and open-access model allows us to quickly distribute new scientific concepts. Our Editors, assisted by peer review, determine whether a manuscript is technically correct and original. After publication, the readership evaluates whether a manuscript is timely, relevant, or significant.
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