本文作者根据尼古拉池(Nikuradse)的试验数值及格伯莱因(Gebelein)的意见,关于勃兰特混和长表示式中比例因数k值在管流断面中并不严格保持一常数,提出表示k值的二项新假定,而由此导出紊流流速分布的一对新公式。经本文计算证实,由这对具有附加项的新公式推演得到的阻力系数公式比习用的勃兰特公式更为合理,并且在管壁附近的流速分布亦较勃氏公式更与试验数值相符,但在靠近管中心部近的流速分布则勃氏公式更为与试验值一致。 According to Nikuradse’s test value and Gebelein’s opinion, the author does not strictly maintain a constant value of the ratio factor k in the Brantt mixing length expression, k value of the two new assumptions, and thus derive a new pair of turbulent flow velocity distribution formula. The calculation results show that the drag coefficient deduced from the new formulas with additional items is more reasonable than the conventional Brandt formula and the distribution of flow velocity near the pipe wall is more consistent with the test data than the Boehringer’s formula. However, the distribution of velocity near the center of the pipe is more consistent with the experimental value.