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就我国煤矿通风设计计算中通常采用的流速当量直径及流量当量直径在矩形风道单位长度摩擦阻力线算图查算中,所得结论有所不同。对两个定义下的矩形风道单位长度摩擦阻力(比摩阻)进行了理论上的分析和论证,并提出改进意见。
In our calculation of coal mine ventilation design commonly used flow equivalent diameter and flow equivalent diameter rectangular duct unit length frictional resistance calculation diagram, the conclusions obtained are different. The theoretical analysis and demonstration of the frictional resistance (specific friction) per unit length of rectangular duct under the two definitions are made and the suggestions for improvement are put forward.