论文部分内容阅读
在传统的矩形巷道摩擦阻力中,需用到流速或流量当量直径。然而,在管道单位长度摩擦阻力线算图中,运用两者查算矩形管道单位长度摩擦阻力(比摩阻)时,所得结论并不相同。为此,基于当量直径的定义,引入动能当量直径的概念并推导出数学表达式,以解决这种偏差。
In the traditional rectangular roadway frictional resistance, the need to use the flow rate or flow equivalent diameter. However, when calculating the frictional resistance line per unit length of pipelines, the two conclusions are not the same when they are used to calculate the frictional resistance (specific friction) per unit length of rectangular pipe. For this reason, based on the definition of equivalent diameter, the concept of kinetic energy equivalent diameter is introduced and the mathematical expression is derived to solve this deviation.