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一、序透过系数是多孔材料的一个重要性能参数。有关这个参数的测定方法已在本刊(1976年第4期61～69)发表。为便于大量实测,该文曾提出了用诺模图进行快速计算的方法。而上述诺模图的绘制是以一维透过为基础的,由于使用诺模图具有一系列的优点,并已习惯地运用下来了。因此,操作者希望在多孔圆筒试样的测试中也仍能用已有的计算工具。但由于圆筒试样的测定是个二维透过过程,因此在使用原有的诺模图计算时要进行必要的修正。为此这里讨论了多孔圆筒试样透过系数的计算以及相关的修正方法问题。
First, the coefficient of order through the porous material is an important performance parameters. The measurement of this parameter has been published in the journal (No. 4, 1976, pp. 61-69). In order to facilitate a large number of measured, this article has proposed a rapid calculation method using the nomogram. The drawing of the above nomograph is based on one-dimensional transmission, and has a series of advantages due to the use of nomograph and has been used conventionally. Therefore, the operator hopes that the existing computational tools can still be used in the testing of porous cylindrical specimens. However, since the measurement of the cylinder sample is a two-dimensional transmission, the necessary corrections must be made when using the original nomogram calculation. For this reason, we discuss the calculation of the transmission coefficient of the porous cylinder sample and the related correction methods.