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Flow visualization study of synthetic flow control in the indoor environment

机译：室内环境下综合流量控制的流量可视化研究

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摘要

An experimental flow visualization study was conducted to assess the ability of synthetic jets to control airflows and particulates in an indoor environment. Flow visualization was used to determine whether paired synthetic jet modules installed adjacent to a supply diffuser could significantly impact room air distribution by changing the angle at which the supply air left the diffuser and mixed into the room. Controlling the supply jet angle can affect how the supply air mixes with the room air and potentially impact the air quality of the room. A laboratory room with 7 air changes per hour (ACH) was selected to perform the present study. This lab space is representative of occupational indoor environments requiring ventilation strategies beyond typical systems to ensure the safe and efficient operation of the space. In this study, four synthetic-jet modules were tested, including two pairs of small 0.5 mm by 27.5 mm rectangular jets driven by one-inch diameter actuators used in a previous small-scale ventilation study and two larger 0.5 mm by 55 mm rectangular jets driven by two-inch diameter actuators constructed specifically for this study. Statistical methods were used to compare the visualized supply flow controlled with active synthetic jets versus a baseline case (with no flow control). A significant increase in the angle of mixing of the supply air of up to 4° or 50% of the original supply jet angle was achieved.
机译：进行了实验流量可视化研究，以评估合成射流在室内环境中控制气流和微粒的能力。流动可视化用于确定在进气扩散器附近安装的成对合成射流模块是否会通过改变进气离开扩散器并混入房间的角度来显着影响室内空气分配。控制送风角度会影响送风与房间空气的混合方式，并可能影响房间的空气质量。选择每小时进行7次换气（ACH）的实验室进行本研究。该实验室空间代表职业室内环境，需要超出常规系统的通风策略以确保空间的安全有效运行。在这项研究中，测试了四个合成喷嘴模块，包括两对由先前的小型通风研究中使用的直径为1英寸的执行机构驱动的0.5 mm x 27.5 mm矩形小喷头和两个较大的0.5 mm x 55 mm矩形喷头由专门为本研究构造的两英寸直径执行器驱动。使用统计方法将主动合成射流控制的可视供应流量与基线情况（无流量控制）进行比较。供应空气的混合角显着增加了多达4°或原始供应射流角的50％。

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  • 来源
    《Building and Environment》 |2014年第3期|239-248|共10页
  • 作者

    Brett McQuillan; Jean Hertzberg; Lupita D. Montoya;

  • 作者单位

    Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, ECES 134, UCB 428, Boulder, CO 80309-0428, USA;

    Department of Mechanical Engineering, University of Colorado Boulder, ECME 220, UCB 427, Boulder, CO 80309-0427, USA;

    Department of Civil, Environmental and Architectural Engineering, University of Colorado Boulder, ECES 134, UCB 428, Boulder, CO 80309-0428, USA,ECES 134, UCB 428, Boulder, CO 80309-0428, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Synthetic jet; Indoor air quality; Airflows; Room mixing; Supply air;

    机译：合成射流室内空气质量气流;房间混合;供气;

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