东南大学学报（自然科学版）Issue(1)：70-75,6.DOI:10.3969/j.issn.1001-0505.2016.01.012
细颗粒长大特性的直接测量
Direct measurement of fine particles growth characteristics
摘要
Abstract
To study the growth characteristics of combustion emission fine particles under supersatu-ration condition, a growth tube in which the supersaturation was formed by cooled gas flow meeting with hot water was designed to facilitate fine particle enlargement.The droplet size distribution after particle enlargement was measured directly by preventing vapor from condensing on measurement window with a hot airflow.The influences of hot water temperature, initial number concentration and gas flow on fine particle growth characteristics were studied by the experimental apparatus.The results show that the increase of water temperature highly improves the performance of fine particle enlargement, and the higher concentration of initial particles disfavors the fine particle enlargement. The increase of gas flow slightly affects the fine particle enlargement within a certain range.Howev-er, when the gas flow increases to 4 L/min, it has a significant influence on particle growth.Under the optimal experiment condition, the mean diameter of the fine particle with an initial mean size of 0.197 μm can be enlarged to 5.411 μm.关键词
细颗粒/过饱和水汽/凝结长大/长大特性Key words
fine particle/supersaturation water vapor/condensation and growth/growth characteristics分类
能源科技引用本文复制引用
徐俊超,张军,于燕,孟强,杨林军,袁竹林,尹艳山..细颗粒长大特性的直接测量[J].东南大学学报（自然科学版）,2016,(1):70-75,6.基金项目
国家自然科学基金资助项目（51576043）、国家重点基础研究发展计划（973计划）资助项目（2013CB228504）、能源高效清洁利用湖南省高校重点实验室开放基金资助项目（2015NGQ003）． （）
