林业科学2009，Vol.45Issue(2)：98-104,7.
流速与压强对马尾松木材气体渗透性的影响
Effect of Flow Rate and Pressure Difference on Determination of Air Permeability of Masson Pine
摘要
Abstract
Longitudinal air permeability of Masson Pine(Pinus massoniana)specimens was determined at different flow rates from 1.3×10-6 to 1.0×105 m3·s-1.The flow rate exhibited a linear and nonlinear relationship with the pressure difference between the ends of specimen within the investigated range.The nonlinear flow component increases with increasing of pressure difierence or flow rate.The flow rate(or the pressure difference)had innuenee on the measured values of the longitudinal air permeability of each specimen.Of six investigated specimens,the relative difference between the maximum and minimum of the longitudinal air permeability was from 3.1%to 5.7%for five specimens.while one specimen had the relative difference as high as 34.2%.It suggested that measurement of air permeability of specimen should be made at different flow rates.Air permeability of wood should be taken from arithmetic or weighed average of values from measurement at different flow rates or different pressure differences.Moreover.the range of flow rates or the pressure differences should also be presented together with the air permeability of wood.关键词
气体渗透系数/流速/马尾松/边材/Kruskal-Wallis检验Key words
gas permeability/flow rate/Masson Pine(Pinus massoniana)/sapwood/Kruskal-Wallis test分类
农业科技引用本文复制引用
侯祝强,费本华,赵荣军,万辉,陈桂华..流速与压强对马尾松木材气体渗透性的影响[J].林业科学,2009,45(2):98-104,7.基金项目
This study was supported by the project of National Natural Science and Foundation(30730076)and Ministry of Science and Technology (2006BAD03A15,2006BAD03A16). （30730076）
