Experimental studies on simultaneously reducing flow drag and noise of a circular cylinder with a downstream porous material plate

IF 2.8 2区 工程技术 Q2 ENGINEERING, MECHANICAL
Chen Xu , Xiaojiang Gu , Yijun Mao , Chao Wang
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引用次数: 0

Abstract

Pressure drag and noise level are two key parameters related to flow past a bluff body, thus various active and passive methods have been developed to reduce the drag and noise. The paper presents a passive method of simultaneously reducing the pressure drag and aerodynamic noise associated with flow past a smooth circular cylinder by placing a porous material plate (PMP) downstream the cylinder. Multi-points instantaneous wall pressure and far-field acoustic pressure have been measured in an anechoic wind-tunnel facility. The experimental results confirm that the PMP is effective to reduce both the pressure drag and the noise level, showing an attractive advantage compared with the impermeable splitter plate and porous coating. Parametric studies reveal effects of the pores per inch (PPI) of PMP, PMP-cylinder spacing and incoming flow velocity on the pressure drag and noise level.

同时降低带有下游多孔材料板的圆筒的流动阻力和噪音的实验研究
压力阻力和噪音水平是与流经崖体有关的两个关键参数,因此人们开发了各种主动和被动方法来减少阻力和噪音。本文提出了一种被动方法,通过在光滑圆筒下游放置多孔材料板(PMP),同时降低流经圆筒时产生的压力阻力和空气动力噪声。在消声风洞设施中测量了多点瞬时壁压和远场声压。实验结果证实,PMP 能有效降低压力阻力和噪音水平,与不透水的分流板和多孔涂层相比,显示出极具吸引力的优势。参数研究揭示了 PMP 的每英寸孔隙 (PPI)、PMP-圆筒间距和入流速度对压力阻力和噪音水平的影响。
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来源期刊
Experimental Thermal and Fluid Science
Experimental Thermal and Fluid Science 工程技术-工程:机械
CiteScore
6.70
自引率
3.10%
发文量
159
审稿时长
34 days
期刊介绍: Experimental Thermal and Fluid Science provides a forum for research emphasizing experimental work that enhances fundamental understanding of heat transfer, thermodynamics, and fluid mechanics. In addition to the principal areas of research, the journal covers research results in related fields, including combined heat and mass transfer, flows with phase transition, micro- and nano-scale systems, multiphase flow, combustion, radiative transfer, porous media, cryogenics, turbulence, and novel experimental techniques.
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