Airflow through Polyurethane Foams with Near-Circular Cell-Face Holes
Airflow through Polyurethane Foams with Near-Circular Cell-Face Holes
复制标题
气流通过具有近圆形孔面孔的聚氨酯泡沫
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
N. J. Mills
中科院分区：
文献类型：
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作者：
C. Fitzgerald;I. Lyn;N. J. Mills
发现一系列开孔慢恢复聚氨酯（PU）泡沫具有大致圆形的孔面孔，其与面面积相比较小。通过泡沫的压力梯度测量的范围内的0.5- 5 ms-1的气流速度，并计算的渗透率K和惯性流动系数B。计算流体动力学（CFD）被用于层流气流通过轴对称模型和常规开尔文泡沫模型。从后者预测的泡沫渗透率接近实验值。有限元分析（FEA）用于预测压力梯度下的细胞面形状变化。然后在CFD模型中使用扭曲的面形状来解释为什么某些泡沫的B值为负值。
A range of open-cell slow-recovery polyurethane (PU) foams were found to have roughly circular cell-face holes, which are small compared with the face area. The pressure gradient through the foam was measured for airflow velocities in the range 0.5–5ms 1, and the permeabilities K and inertial flow coefficients B calculated. Computational Fluid Dynamics (CFD) was used for laminar airflow through both an axisymmetric model and a regular Kelvin foam model. The predicted foam permeabilities from the latter were close to the experimental values. Finite Element Analysis (FEA) was used to predict cell-face shape changes under a pressure gradient. The distorted face shapes were then used in the CFD model to explain why the B values were negative for some foams.