空气动力学学报2024，Vol.42Issue(3)：119-128,10.DOI:10.7638/kqdlxxb-2023.0048
热羽流与置换通风作用下油雾颗粒预测模型
Prediction model of oil mist particles under the effects of heat plume and displacement ventilation
摘要
Abstract
The vertical inhomogeneous particle concentration in a large-space machining workshop with a displacement ventilation system will increase the required ventilation volume for indoor particle concentration reduction.The present work presents a particle concentration prediction model using a zonal modeling method that can rapidly predict the vertical particle concentration distribution for the energy-saving performance analysis of the ventilation system.The model,which takes the wall heat plume zone,heat source heat plume zone,and main airflow zone into account,can obtain the inter-regional airflow based on the energy balance and continuity equations and predict the zonal particle concentration based on the mass balance equations using particle emission rates and inter-regional airflow.A validation experiment conducted in a scaled chamber demonstrates that the relative error of the prediction model is less than 20%,it shows that the model can basically meet the engineering requirements.Further study of the prediction model by a case study under five particle emission conditions showed that the required air volume supply can be reduced by 18.83%to 44.41%compared to the traditional method used on variable air volume system.Overall,the prediction model can accurately and rapidly predict the vertical particle concentration distribution in large-space machining workshops under displacement ventilation,showing promising prospects in optimizing the performance of the ventilation system.关键词
机械加工/油雾颗粒/垂直分布/区域模型/热羽流Key words
machining/oil mist particles/vertical distribution/zone model/thermal plume分类
建筑与水利引用本文复制引用
王非,孟钦鹏,翁文兵,耿宇,王昕..热羽流与置换通风作用下油雾颗粒预测模型[J].空气动力学学报,2024,42(3):119-128,10.基金项目
国家自然科学基金面上项目(52278116) （52278116）
机械工业联合会重点实验室创新平台项目(2019SA-10-07) （2019SA-10-07）
