VELOCITY PROFILES MEASURED FOR AIR-FLOW THROUGH A LARGE-SCALE MODEL OF THE HUMAN NASAL CAVITY
VELOCITY PROFILES MEASURED FOR AIR-FLOW THROUGH A LARGE-SCALE MODEL OF THE HUMAN NASAL CAVITY
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DOI：
10.1152/jappl.1993.75.5.2273
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发表时间：
1993-11-01
影响因子：
3.3
通讯作者：
MOZELL, MM
中科院分区：
文献类型：
--
作者：
HAHN, I;SCHERER, PW;MOZELL, MM
一个解剖学上准确的，x20放大比例的模型，一个健康的成年人的鼻腔构造的计算机轴向断层扫描的研究鼻腔气流模式。详细的速度分布的吸气和呼气流量通过模型和湍流强度进行了测量与热膜风速计探头与1毫米的空间分辨率。研究了通过真实的人鼻子一侧的稳态流量，相当于1，100，560和180 ml/s。气流被确定为中度湍流，但最高和最低流速之间的速度曲线变化表明，对于正常呼吸，鼻腔的大部分区域可能存在层流。最接近模型壁的速度测量值估计在层流子层内部，因此速度剖面的斜率是对壁处速度梯度的合理良好估计。三种吸气流速下鼻腔内的总体纵向压降是根据在中央鼻壁处测量的平均总剪切应力估计的，并且与在人类受试者中测量的文献值显示出良好的一致性。
An anatomically accurate, x20 enlarged scale model of a healthy right human adult nasal cavity was constructed from computerized axial tomography scans for the study of nasal airflow patterns. Detailed velocity profiles for inspiratory and expiratory flow through the model and turbulence intensity were measured with a hot-film anemometer probe with 1 mm spatial resolution. Steady flow rates equivalent to 1,100, 560, and 180 ml/s through one side of the real human nose were studied. Airflows were determined to be moderately turbulent, but changes in the velocity profiles between the highest and lowest flow rates suggest that for normal breathing laminar flow may be present in much of the nasal cavity. The velocity measurements closest to the model wall were estimated to be inside the laminar sublayer, such that the slopes of the velocity profiles are reasonably good estimates of the velocity gradients at the walls. The overall longitudinal pressure drop inside the nasal cavity for the three inspiratory flow rates was estimated from the average total shear stress measured at the central nasal wall and showed good agreement with literature values measured in human subjects.