Improvement of airflow uniformity and noise reduction with optimized V-shape configuration of perforated plate in the air distributor

IF 3.2 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Indoor and Built Environment Pub Date : 2023-11-20 DOI:10.1177/1420326x231217477

Zhe Liu, Bo-Hua Sun, Haihang Cui, Minghua Huang

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引用次数: 0

Abstract

The air distributor is the end component of the ventilation system, and its performance directly determines the comfortable and pleasant feeling of the residence. A perforated plate can be added to the air distributor to convert dynamic pressure into static pressure first and then distribute the air flow, which provides better self-adjustment compared with the embedded guide vane structure. However, the perforated plate can lead to a contradiction between head loss, noise and distribution uniformity. To reconcile this problem, a novel V-shape configuration of the perforated plate was put forward in this study. The internal flow and aeroacoustic properties of different types of perforated plates were systematically studied, and a full-scale test platform was built to verify the flow characteristics. The effects of hole size and installation position of the perforated plate on the uniform distribution of air flow were analyzed by the parametric analysis method. Then, the sound pressure level of the optimized perforated plate air distributor was further analyzed. The results show that, with the optimized perforated plate structure, the uniform flow performance was improved by about 30% and the overall sound pressure level was reduced by up to 12 dB.

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通过优化空气分配器中穿孔板的 V 形配置，改善气流均匀性并降低噪音

空气分配器是通风系统的末端部件，其性能直接决定了住宅的舒适度和愉悦感。在空气分配器上加装穿孔板，可以先将动压转化为静压，然后再分配气流，与嵌入式导叶结构相比，具有更好的自调节能力。然而，穿孔板会导致水头损失、噪音和分布均匀性之间的矛盾。为了解决这一问题，本研究提出了一种新颖的 V 型穿孔板结构。系统研究了不同类型穿孔板的内部流动和气声特性，并搭建了一个全尺寸试验平台来验证其流动特性。通过参数分析方法，分析了穿孔板的孔径和安装位置对气流均匀分布的影响。然后，进一步分析了优化后的穿孔板空气分布器的声压级。结果表明，采用优化的穿孔板结构后，均匀气流性能提高了约 30%，整体声压级降低了 12 dB。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Indoor and Built Environment 环境科学-工程：环境

CiteScore

6.40

自引率

25.00%

发文量

130

审稿时长

2.6 months

期刊介绍： Indoor and Built Environment publishes reports on any topic pertaining to the quality of the indoor and built environment, and how these might effect the health, performance, efficiency and comfort of persons living or working there. Topics range from urban infrastructure, design of buildings, and materials used to laboratory studies including building airflow simulations and health effects. This journal is a member of the Committee on Publication Ethics (COPE).