湿度对矩形窄通道内细颗粒热泳沉积的影响

摘要/Abstract

摘要：

摘要：通过建立考虑空气含湿量影响的矩形窄通道模型，利用Fortran软件编程及Fluent软件模拟，研究了矩形窄通道内细颗粒的热泳沉积情况，提出了一种利用Fluent软件计算矩形窄通道内热泳沉积率的方法，并与Fortran编程的计算结果进行比较.结果表明，随着空气含湿量增大，热泳沉积率增加；在空气含湿量相同的条件下，热泳沉积率随着颗粒直径减小而增大，随着管道内压力增加而减少，随着温度梯度增大而增加；此外，不同粒子的热物性不同，导致其热泳沉积率不同；所提出的计算方法虽能够反映热泳沉积率随空气含湿量、颗粒直径和压力变化的规律，但其计算结果偏小，可采取增大管道内空气含湿量及减小管道内压力的措施来提高细颗粒的热泳沉积率.

关键词: 气溶胶, 热泳, 含湿量, 窄矩形, 多相流

Abstract:

Abstract： The code of Fortran and Fluent were selected to study thermophoretic deposition of particles in rectangular narrow channel by considering the humidity ratio of air. Meanwhile, an approach of using the code of Fluent to calculate the thermophoretic deposition rate was proposed, and verified by the results of Fortran programming. The results show that the thermophoretic deposition rate increases with the increase of humidity ratio of air. When the humidity ratio is invariant, the thermophoretic deposition rate increases with the decrease of particle size and pressure, and with the increase of temperature gradient. In addition,different thermal properties of different particles lead to differences in thermophoretic deposition rate. Although the method proposed could reflect the law that the thermophoretic deposition rate changes with the humidity ratio, particle size and variation of the pressure, the calculation result is small. Measures such as improving the humidity ratio of gas and reducing the pressure in the pipe can be taken to increase the deposition rate of fine particles.

Key words: aerosol, thermophoretic, humidity ratio, narrow channel, multiphase flow

中图分类号:

TL 331

周涛1,2，杨旭1,2，林达平1,2，樊昱楠1，汝小龙1. 湿度对矩形窄通道内细颗粒热泳沉积的影响[J]. 上海交通大学学报（自然版）, 2015, 49(05): 718-724.

ZHOU Tao1,2,YANG Xu1,2,LIN Daping1,2,FAN Yunan1,RU Xiaolong1. Impact of Humidity on Aerosol Thermophoretic Deposition Rectangular Narrow Channel[J]. Journal of Shanghai Jiaotong University, 2015, 49(05): 718-724.

参考文献

［1］Porcheron E, Lemaitre P, Marchand D, et al. Experimental and numerical approaches of aerosol removal in spray conditions for containment application ［J］. Nuclear Engineering and Design, 2010, 240 (2): 336343.

［2］张记刚. 窄通道中细颗粒温度场内运动特性研究［D］. 华北电力大学能源动力与机械工程学院, 2011.

［3］杨林民, 周涛, 陆道纲. 压水堆严重事故下气溶胶热泳沉积规律［J］. 原子能科学技术, 2008, 42(1): 6366.

YANG Linmin, ZHOU Tao, LU Daogang. Law of aerosol thermophoretic deposition at severe accidents of pressurized water reactor ［J］. Atomic Energy Science and Technology, 2008, 42(1):6366.

［4］Healy D P, Young J B. An experimental and theoretical study of particle deposition due to thermophoresis and turbulence in an annular flow ［J］. International Journal of Multiphase Flow, 2010, 36(1112): 870881.

［5］Abdolzadeh M, Mehrabian M A. Combined effect of thermophoretic force and other influencing parameterson the particle deposition rate on a tilted rough surface ［J］. International Journal of Thermal Sciences, 2011, 50(6): 954964.

［6］Lee B U, Byun D S, Bae G N, et al. Thermophoretic deposition of ultrafine particles in a turbulent pipe flows: Simulation of ultrafine particle behavior in an automobile exhaust pipe ［J］. Journal of Aerosol Science, 2006, 37(12): 17881796.

［7］Lin J S, Tsai C J, Tung K L, et al. Thermophoretic particle deposition efficiency in turbulent tube flow［J］. Journal of the Chinese Institute of Chemical Engineers, 2008, 39(3): 281285.

［8］韩云龙, 胡永梅, 钱付平. 通风管道内温湿度对颗粒沉积的影响［J］. 土木建筑与环境工程, 2010, 32(4): 6670.

HAN Yunlong, HU Yongmei, QIAN Fuping. Effects of air temperature and humidity on particle deposition in a ventilation duct ［J］. Journal of Civil, Architectural and Environment Engineering, 2010, 32(4): 6670.

［9］周涛, 杨瑞昌, 张继刚,等.矩形管边界层内亚微米颗粒运动热泳规律的实验研究［J］. 中国电机工程学报, 2010, 30(2): 9297

ZHOU Tao, YANG Ruichang, ZHANG Jigang, et al. Experimental study on the thermophoresis movement of submicron particle in the boundary layer of the rectangular pipe ［J］. Proceedings of the CSEE, 2010, 30(2): 9297.

［10］周涛, 杨瑞昌, 赵磊. 湍流环形通道热泳脱除可吸入颗粒物技术研究［J］.环境污染治理技术与设备, 2006, 7(3): 134137.

ZHOU Tao, YANG Ruichang, ZHAO Lei. Technical study on removing inhaled PM2.5 by using themophoresis in annular channel with turbulent flow ［J］. Techniques and Equipment for Environmental Pollution Control, 2006, 7(3): 134127.

［11］沈维道, 蒋智敏, 童钧耕. 工程热力学［M］. 北京:高等教育出版社, 2000: 4649.

［12］张静波, 倪波. 高温湿空气热物理性质计算方程［J］. 中国纺织大学学报, 1998,24 (2): 7376.

ZHANG Jingbo, NI Bo. Equation for calculating thermophysical properties of high temperature moist air ［J］. Journal of China Textile University, 1998, 24(2): 7376.

［13］纪威, 杨萱. 湿空气热物理性质计算方程［J］. 暖通空调, 1996 (3): 1619.

JI Wei, YANG Xuan. Equations for calculating thermophysical properties of moist air ［J］. Journal of HV and AC, 1996 (3): 1619.

［14］杨世铭, 陶文铨. 传热学［M］.北京:高等教育出版社,1998.

［15］于平安, 朱瑞安, 喻真烷, 等. 核反应堆热工分析［M］. 上海:上海交通大学出版社, 2002.

［16］Batchelor G K, Shen C. Thermophoretic deposition of deposition of particles in gas flowing over cold surface ［J］. Journal of Colloi, 1985, 107(1): 2137.

［17］樊昱楠. 多气载细颗粒热泳沉积研究［D］. 北京：华北电力大学能源动力与机械工程学院, 2013.

［18］王泽雷. 窄通道中固液细粒子混合运动研究［D］. 北京：华北电力大学核科学与工程学院, 2013.

［19］杨瑞昌, 周涛, 刘若雷, 等. 温度场内可吸入颗粒物运动特性的实验研究［J］. 工程热物理学报, 2007, 28(2): 259261.

YANG Ruichang, ZHOU Tao, LIU Ruolei, et al. Investigation on dynamic characteristics of inhaled particles in temperature field ［J］. Journal of Engineering Thermophysics, 2007, 28(2): 259261.

[1]	张晓嵩，万德成. 运动船舶周围为什么会出现大范围白色泡沫流动？[J]. 上海交通大学学报, 2021, 55(Sup.1): 65-66.
[2]	许海雨, 罗凯, 黄闯, 左振浩, 古鉴霄. 低弗劳德数通气超空泡初生及发展演变特性[J]. 上海交通大学学报, 2021, 55(8): 934-941.
[3]	邹鑫尧，高展，黄震，朱磊. 主碳链长度对脂肪酸甲酯扩散火焰碳烟生成及其演变规律的影响[J]. 上海交通大学学报, 2019, 53(11): 1276-1284.
[4]	刘东喜1，唐文勇1，王晋1, 2，薛鸿祥1. 基于非均质多相流模型的液舱晃荡数值模拟[J]. 上海交通大学学报（自然版）, 2017, 51(3): 283-.
[5]	陈彦君，李元阳，刘振华. 基于多相流模型的腔体内纳米流体自然对流换热数值模拟[J]. 上海交通大学学报（自然版）, 2015, 49(05): 600-607.
[6]	陈彦君，李元阳，刘振华. 基于多相流模型的纳米流体在水平细圆管内强制对流换热数值模拟[J]. 上海交通大学学报（自然版）, 2014, 48(09): 1303-1308.
[7]	傅慧萍. 基于相群平衡模型的舰船气泡尾流数值模拟[J]. 上海交通大学学报（自然版）, 2013, 47(04): 538-543.
[8]	卫琛喻, 臧述升, 葛冰, 蒲强. 小型燃气轮机湿空气透平循环变工况性能[J]. 上海交通大学学报（自然版）, 2013, 47(03): 346-351.
[9]	王新昶1，孙方宏1，孙乐申2，丁庆华2，彭东辉3. 高压差高固含量减压阀的仿真优化设计[J]. 上海交通大学学报（自然版）, 2011, 45(11): 1597-1601.