Experimental assessment of a new salt aerosol generator for measuring efficiency of automotive air filters  

作　　者：周斌 张小松 P.Tronville 惠慕贤 惠旅锋 

机构地区：[1]School of Energy and Environment,Southeast University [2]Key Laboratory of Environmental Medicine Engineering of Ministry of Education,Southeast University [3]Politecnico di Torino,Corso Duca degli Abruzzi 24,Torino 10129,Italy [4]Suxin Cleanroom Equipment Factory

出　　处：《Journal of Central South University》2012年第3期682-687,共6页中南大学学报（英文版）

基　　金：Project(2010EME006) supported by Open Fund of the Key Laboratory of Environmental Medicine Engineering of Ministry of Education of China; Project(51008063) supported by the National Natural Science Foundation of China; Project(3203000601) supported by the Postdoctoral Key Research Program from Southeast University, China; Project(2011BAJ03B05) supported by the National Science and Technology Pillar Program during the 12th Five-Year Plan Period of China

摘　　要：Generation of polydisperse KCl aerosol with a new salt aerosol generator was investigated, Special attention was paid on particles with diameters between 3 and 10 μm. The main improvement consists of the different routes of KCl solution droplets. In traditional generators, the solution droplets travel through one cylinder; while in the case analyzed here, after spray atomization, the droplets travel through two cylinders in series. The first cylinder was fed with warm air and the second one with cold air. In such way, the complete evaporation of the water from the droplets can be ensured. The influencing factors of the generated aerosol size distribution were investigated. The data measured show that the concentration of generated aerosol becomes higher both increasing the flow rate of the KCI solution injected in the first cylinder and increasing the concentration in the solution. The temperature of solution influences mainly the generation of smaller KCI particles （0,3-3 μm）. The amount of hot air used in the generation process increases the concentration of larger KC1 particles （〉3 μm） while cold air does not have the same effect. The aerosol generator is able to generate KC1 aerosol stably. This instrument can be used effectively for testing air filters for automotive.Generation of polydisperse KCl aerosol with a new salt aerosol generator was investigated.Special attention was paid on particles with diameters between 3 and 10 μm.The main improvement consists of the different routes of KCl solution droplets.In traditional generators,the solution droplets travel through one cylinder;while in the case analyzed here,after spray atomization,the droplets travel through two cylinders in series.The first cylinder was fed with warm air and the second one with cold air.In such way,the complete evaporation of the water from the droplets can be ensured.The influencing factors of the generated aerosol size distribution were investigated.The data measured show that the concentration of generated aerosol becomes higher both increasing the flow rate of the KCl solution injected in the first cylinder and increasing the concentration in the solution.The temperature of solution influences mainly the generation of smaller KCl particles(0.3-3 μm).The amount of hot air used in the generation process increases the concentration of larger KCl particles(>3 μm) while cold air does not have the same effect.The aerosol generator is able to generate KCl aerosol stably.This instrument can be used effectively for testing air filters for automotive.

关 键 词：aerosol generation potassium chloride aerosol droplet-to-particle conversion air filter testing 

分 类 号：U464.134.4[机械工程—车辆工程]