非等温热源作用下的工业热廊道热压自然通风特性研究
蒲 静,蒋福建,袁艳平,敬瑶阁

(西南交通大学 机械工程学院，四川 成都 610031)

工业建筑; 热廊道; 热压自然通风; 非等温热源

Study on natural ventilation characteristics of industrial thermal corridor under non-isothermal heat source
PU Jing, JIANG Fujian, YUAN Yanping, JING Yaoge

(School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China)

industrial building; thermal corridor; buoyancy-driven natural ventilation; non-isothermal heat source

DOI: 10.15986/j.1006-7930.2022.05.016

备注

在工业建筑中，因干燥、烧制等生产工艺的要求，连续排列的多个高温设备将组成具有大长宽比的带状体热源，并在此类热源附近形成高温廊道.本文以工业车间热廊道为对象，通过数值模拟的方法，研究了在非等温热源作用下，其内部热压自然通风的基本特性.首先对比分析了两热源在等温和非等温下的厂房温度场和速度场分布差别:非等温热源作用下，高温热源侧的气流因浮力向上迁移，低温热源侧的气流则被诱导降沉至中间廊道，以减缓中部区域的热堆积.并进一步研究了两热源的不同温度差异对热压自然通风效果的影响，结果表明，随着两热源温差的增大，廊道上方左右两股气流的汇合位置逐渐向高温热源侧偏移.研究结果可为热廊道厂房在非等温热源作用下的自然通风设计提供参考.
In industrial buildings, due to the requirements of drying, firing and other processes, continuous arrangement of multiple high-temperature equipment will form strip heat sources with large aspect ratio, and form high temperature corridors near such heat sources. In this paper, the basic characteristics of the internal buoyancy-driven natural ventilation under non-isothermal heat sources are studied by numerical simulation with the thermal corridor of industrial workshop as the object. Firstly, the difference of temperature field and velocity field distribution between the two heat sources under isothermal and non-isothermal conditions is compared and analyzed. Under the action of non-isothermal heat sources, the airflow on the high temperature heat source side moves upside due to buoyancy, and the airflow on the low temperature heat source side is induced to sink to the middle corridor to slow down the heat accumulation in the central region. The influence of different temperature differences between the two heat sources on the effect of buoyancy-driven natural ventilation is further studied. The results show that with the increase of the temperature difference between the two heat sources, the convergence position of the left and right airflows above the corridor gradually shifts to the high-temperature heat source side. The research results can provide reference for natural ventilation design of thermal corridor plant under non-isothermal heat source.