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Investigation on the flow noise propagation mechanism in pipelines of shell-and-tube heat exchangers based on synergy principle of flow and sound fields

机译:基于流量和声场协同原理的壳管热交换器管道流动噪声传播机制研究

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摘要

As major equipment for implementing technological process, Shell-and-Tube Heat Exchangers are widely used in modern industries. Because the noise propagation in pipelines in shell-and-tube heat exchangers can't be ignored, it is a key point to investigate the transfer mechanism of sound energy in pipelines and develop high efficiency mufflers with low penalty of pressure drop. Different with the traditional method, this study is focused on the flow and sound fields synergy principle to investigate the flow noise propagation mechanism in pipelines. In this study, theoretical analysis and numerical simulation methods are coupled to investigate the pipeline noise propagation process. Based on the momentum and the energy equations in the sound field, the synergetic relationship between the flow field and the pressure gradient field is deduced, and the field synergy theory is established. The flow noise propagation process of noise in the pipeline is studied by numerical simulation. The synergy is verified by analyzing the calculating results of flow and sound fields. The results show that with the increase of synergy between flow and sound fields, the work done by the fluid on the wall increases, which means the exchange of sound energy between the wall and the fluid increases. (C) 2017 Elsevier Ltd. All rights reserved.
机译:作为实施技术过程的主要设备,壳管热交换器广泛应用于现代行业。由于壳管热交换器中管道中的噪声传播不能被忽略,因此研究管道中声能的转移机制,开发高效率消失,增加压降的高效消声器。与传统方法不同,本研究专注于流量和声场协同原理,以研究流水线的流动噪声传播机制。在本研究中,理论分析和数值模拟方法耦合以研究流水线噪声传播过程。基于声场中的动量和能量方程,推导出流场和压力梯度场之间的协同关系,建立了现场协同理论。通过数值模拟研究了管道中噪声的流动噪声传播过程。通过分析流量和声场的计算结果来验证协同作用。结果表明,随着流动和声场之间的协同作用的增加,通过流体在壁上完成的工作增加,这意味着壁之间的声能和流体之间的交换增加。 (c)2017 Elsevier Ltd.保留所有权利。

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