摘要
在由半理想化口腔通道和非对称3级肺气管构成的人体上呼吸道模型中添加软骨环结构,选用k-ω湍流方程,在稳态吸气速率15、30、60L/min下,通过数值模拟方法研究了软骨环对粒子沉淀率的影响。与光滑直管作为气管的上呼吸道模型的模拟结果对比发现,由于软骨环的存在,3种吸气速率下不同大小粒子的沉淀率都显著增加,其中在气管部的增加是主要因素,支气管部次之,而对上游的口咽喉部没有影响。
The effects of cartilaginous rings on particle deposition were in- vestigated numerically under three steady flow rates （ 15, 30, 60 L/min）, using k-to turbulance equation. The airway model consisted of oral airway and asymmetric tracheobronchial （TB） airway, with 14 cartilaginous rings in trachea. Comparing with the numerical data from a smooth-walled airway model, the total deposition fraction of various particles enhanced significantly in three flow rates. The enhanced regional deposition in trachea was primary relative to the main and lobar bronchi region. The cartilaginous rings appeared to have negligible effect in mouth-throat region.
出处
《中国粉体技术》
CAS
北大核心
2010年第1期85-88,共4页
China Powder Science and Technology
基金
国家自然科学基金项目
编号:10672081
中国科学院地球环境研究所黄土与第四纪地质国家重点实验室开放基金项目
编号:SKLLQG000
关键词
软骨环
上呼吸道
气溶胶
沉淀
cartilaginous rings
upper airway
aerosol
deposition fraction
