毛细管中气溶胶漏率与气体漏率相关性研究  

Investigation on Correlation of Aerosol Leakage Rate With Gas Leakage Rate in Capillary

作　　者：张志弘[1] 党海军[1] 刘龙波[1] 

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《原子能科学技术》2012年第12期1517-1521,共5页Atomic Energy Science and Technology

摘　　要：在气溶胶泄漏评估中,需深入分析气溶胶漏率与气体漏率的相关性。本文归纳总结了气体漏率和气溶胶漏率的计算方法,对不同条件下毛细管中的亚微米级气溶胶漏率进行了实验研究,分析了上游数浓度、气体流速和上游压力对气溶胶泄漏的影响。结果表明:当气体漏率高于10-4 Pa·m3·s-1时,气溶胶漏率和气体漏率成线性关系;当气体漏率低于10-4 Pa·m3·s-1时,气溶胶漏率的降低速率较气体漏率的更迅速,对于亚微米气溶胶,扩散沉积是造成气溶胶损失的主要机制。为方便使用,本文提出一个在一定假设条件下利用气体漏率和漏孔长度对漏孔中的气溶胶漏率进行估算的方法。It is necessary to build up the correlation of the aerosol leakage rate with the gas leakage rate for evaluating aerosol leakage of nuclear facilities.The method of evaluating leakage rate of gas and sub-micron aerosol was summarized and also investigated by experiment.The effects of upstream aerosol number concentration,flow velocity and upstream pressure on aerosol leakage were analyzed based on the experimental results.The results show that the aerosol leakage rate is linearly related to the gas leakage rate in capillary when the gas leakage rate is higher than 10-4 Pa·m3·s-1;the aerosol leakage rate falls sharply due to the diffusion deposition mainly for sub-micron aerosol when the gas leakage rate is lower than 10-4 Pa·m3·s-1.The aerosol leakage rate is explored to be expressed as a function of the gas leakage rate and the orifice length under some certain assumptions for practical application.

关 键 词：气溶胶泄漏 气体漏率 毛细管 

分 类 号：TL75[核科学技术—辐射防护及环境保护]