木材纹孔膜微孔尺寸与数目计算

CALCULATION OF PIT OPENING RADII AND NUMBER OF OPENING IN WOOD PIT MEMBRANE

本文应用多孔介质流体力学理论,根据木材平行毛细管模型计算了我国东北红松(Pinus Koraiensis)和兴安落叶松(Larix dahurica)两种木材纹孔膜上微孔的平均半径r和有效微孔数目N。结果为:红松边材,r=0.8280μm,N=15.976×10~7/cm^2;红松心材,r=0.8645μm,N=4.096×10~7/cm^2;兴安落叶松心材,r=1.056μm,N=1.248×10~7/cm^2。该方法为木材构造研究提供了新的手段。

In the paper, the theory of porous medium fluid dynamics was applied, according to the model of the wood parallel capillary-tubes, the number of openings per cm^2 of cross section and pit-opening average radii of the Pinus Koraiensis and' Larix Dahurica which grew in Northeastern area in China were calculated. The results indicate that Pinus sapwood, r=0.8280μm, N=15.976×10~7/cm^2; Pinus heartwood, r=0.8645μm, N=4.096×10~7/cm^2,Larix heartwood, r=1.056μm, N=1.248×10~7/cm^2. This method is a new medium for study on wood structure.