The article presents the results of comparative analysis of formulas to determine the value of Darcy coefficient in longitudinally uniform turbulent flows (round pipes). For this purpose the old (traditional) formulas and the latest ones obtained by the Princeton “Superpipe” and Oregon device, as well as modern precision measuring techniques were used. Comparison with the experimental data obtained by the unique installations has allowed laying down guidance for the use of formulas created by different authors.
Keywords: smooth pipes, Darcy coefficient, distribution of averaged velocities, wind tunnel, liquefied gases.
