多组分气体传质简化模型理论分析及数值验证

doi:10.16265/j.cnki.issn1003-3033.2024.10.0125

中国安全科学学报 ›› 2024, Vol. 34 ›› Issue (10): 124-133.doi: 10.16265/j.cnki.issn1003-3033.2024.10.0125

多组分气体传质简化模型理论分析及数值验证

曹莹雪¹^,²(), 王金宵², 王怡¹^,³^,^**(), 黄艳秋¹^,³, 李浩东², 孟晓静²

¹ 西安建筑科技大学绿色建筑全国重点实验室,陕西西安 710055
² 西安建筑科技大学资源工程学院, 陕西西安 710055
³ 西安建筑科技大学建筑设备科学与工程学院,陕西西安 710055

收稿日期:2024-06-16 修回日期:2024-08-19 出版日期:2024-10-28
通信作者:
^** 王怡(1970—),女,山东龙口人,博士,教授,主要从事工业建筑环境方面的研究。E-mail: wangyi@xauat.edu.cn。
作者简介:
曹莹雪 (1988—),女,辽宁沈阳人,博士,副教授,主要从事工业建筑环境主-被联合控制技术、工业职业健康评估等方面的研究。E-mail:yxcao1206@xauat.edu.cn。
黄艳秋，教授；
孟晓静，教授
基金资助:
国家自然科学基金面上项目资助(52178089); 榆林市科技计划产学研合作项目(CXY-2021-139)

Theoretical analysis and numerical verification of simplified mass transport model for multi-component gas

CAO Yingxue¹^,²(), WANG Jinxiao², WANG Yi¹^,³^,^**(), HUANG Yanqiu¹^,³, LI Haodong², MENG Xiaojing²

¹ State Key Laboratory of Green Building, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China
² School of Resource Engineering, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China
³ School of Building Services Science and Engineering, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China

Received:2024-06-16 Revised:2024-08-19 Published:2024-10-28

摘要/Abstract

摘要：

为明确厂房内污染气体的分布特征,高效控制工业建筑环境,研究分析多种气态污染物与单一气态污染物分布特征间的区别及简化条件,明确同源同时散发的多组分混合气体的运输特性,揭示全尺度中多组分混合气体传质简化的可行性范围及需遵循的原则,并通过数值模拟验证结论的有效性。结果表明: 多组分气体传质简化模型的适用范围为:同源散发的混合气体在无相变和化学反应时,其流动参数雷诺数Re量级在10³以上,且马赫数Ma<0.3时,物性参数在克努森数Kn<0.01且温度在0.3倍的振动特征温度θ_v和沸腾温度T'之间,可简化组分进行污染物分布特征研究;简化偏差源于简化前后单位质量混合气体体积力之差(ΔF),简化时需保障ΔF与主要驱动力之比小于0.01;理论模型的适用范围及简化原则与模拟结果相符,证明在适用范围内满足简化原则的条件下,可以将多种气态污染物简化为单一种类探究污染物分布特征。

关键词: 气态污染物, 多组分气体, 传质简化模型, 简化原则, 数值模拟

Abstract:

In order to explicit the distribution characteristics of polluted gases in factory buildings and realize efficient control of industrial building environments, the study analyzed the differences and simplification conditions between the distribution characteristics of multiple gaseous pollutants and single gaseous pollutants, clarified the transportation characteristics of multi-component mixed gases emitted simultaneously from the same source, revealed the feasibility range and principles to be followed for mass transfer simplification of multi-component mixed gases in full scale, and verified the validity of the conclusion through numerical simulation. The results show that the applicable range of the multi-component gas mass transfer simplification model is as follows: when the mixed gas emitted from the same source has no phase change and chemical reaction, and its flow parameter Reynolds number Re is above 10³ and Mach number Ma < 0.3, and the physical property parameters are within the range of Knudsen number Kn < 0.01 and temperature between 0.3 Characteristic vibrational temperature θ_v and T', the components can be simplified for studying the distribution characteristics of pollutants. The simplified deviation stems from the difference in volume force per unit mass of the mixed gas before and after simplification (ΔF). When simplifying, it is necessary to ensure that the ratio of ΔF to the main driving force is less than 0.01. The theoretical model's application range and simplification principle agree with the simulation results. It is proved that a variety of gaseous pollutants can be simplified into a single type under the condition that the simplification principle is met within the applicable scope to explore the distribution characteristics of pollutants.

Key words: gaseous pollutants, multi-component gas, mass transfer simplification model, simplification principle, numerical simulation

中图分类号:

X962工业通风

曹莹雪, 王金宵, 王怡, 黄艳秋, 李浩东, 孟晓静. 多组分气体传质简化模型理论分析及数值验证[J]. 中国安全科学学报, 2024, 34(10): 124-133.

CAO Yingxue, WANG Jinxiao, WANG Yi, HUANG Yanqiu, LI Haodong, MENG Xiaojing. Theoretical analysis and numerical verification of simplified mass transport model for multi-component gas[J]. China Safety Science Journal, 2024, 34(10): 124-133.

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序号	气体组分/%			温度/K	初速度/(m·s^-1)	R₁	R₂
1	HF:50	CO₂:5	He:5	300	10	0.000 6	0.118
2	HF:5	CO₂:20	He:2	300	5	0.002 19	0.313
3	HF:55	CO₂:35	He:5	800	1	1.12	0.26
4	HF:5	CO₂:40	He:50	800	0.1	290	0.47
5	SO₂:20	CO₂:5	He:70	800	0.5	643	0.897
6	HF:1	CO₂:1	He:95	300	0.5	0.612	0.093
7	SO₂:80	CO₂:5	He:5	800	0.5	0.117 8	0.008 94
8	SO₂:20	CO₂:30	He:45	800	0.5	16.79	1.031
9	SO₂:20	CO₂:30	He:45	300	0.5	6.295	75.15
10	SO₂:25	CO_2:22	He:48	300	0.5	6.934	411.12

多组分气体传质简化模型理论分析及数值验证

Theoretical analysis and numerical verification of simplified mass transport model for multi-component gas

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