论文部分内容阅读
在广泛参考各种上呼吸道物理模型的基础上,运用软件Solid Works建立对称与非对称的两种一级支气管的三维几何模型。采用计算流体软件ANSYS CFX对人体支气管内两相流动进行计算,模拟气流、粉尘在呼吸道内的流动。在具有代表性的流量为30 L/min、60L/min和90 L/min呼吸强度下,对空气的速度,压力以及粒子在气管内沉积进行对比分析。结果表明:粒子沉积部位主要在分叉面和分支内壁面上;相同流量下,管径越细粒子的沉积量越大。
Based on a wide range of physical models of upper respiratory tract, three-dimensional geometric models of two primary bronchus, symmetrical and asymmetrical, were established using software Solid Works. Computational fluid software ANSYS CFX was used to calculate the two-phase flow in the human bronchus to simulate the flow of air and dust in the respiratory tract. At representative flow rates of 30 L / min, 60 L / min, and 90 L / min respiration, air velocity, pressure, and particle deposition in the trachea were compared. The results show that the particle deposition sites are mainly on the bifurcation plane and on the inner wall of the branch. At the same flow rate, the finer the particle deposition is, the larger the particle diameter is.