The results of investigations relative to formulas for the flow of water in pipes by Weston Edmund B

Author:Weston, Edmund B[rownell], 1850- [from old catalog]
Language: eng
Format: epub
Tags: Hydraulics
Publisher: [New York]
Published: 1890-03-25T05:00:00+00:00

WESTON ON" FLOW OF WATER IN PIPES.

51

Fl

An independent formula £ = a -j-

/i

*/v

was first determined for each

diameter of pipe that the experimental data embraced.

The numerical values of a and /? were deduced graphically in the following manner by the aid of the expression C +/v, which is the equation of the straight line o Jc, Fig. 1 (and the average lines shown upon the diagrams from No. 1 to No. 5), whose abscissae are the values of ^v, and whose ordinates are the values of £ \/v~.

A line was drawn upon the lower part of a large sheet of paper, with a sharp pointed lead pencil, as an axis of abscissae, and another line drawn in the same way at right angles to it, at its left extremity, as an axis of ordinates.

Then at a scale of 1 inch to 4 feet the square roots of the velocities (v/^T) that were used in computing the experimental co-efficients of friction (Q were platted as abscissae, and the experimental co-efficients of friction multiplied by the square roots of their respective velocities (C \/v ) platted as ordinates, at such a scale that four decimal places could be easily read.

At the upper extremity of each ordinate a small circle or symbol was drawn in ink, as shown on the diagrams from No. 1 to No. 5, in order to render it conspicuous, and to designate the results obtained from the experiments of each authority.

If all of the minute errors could have been detected, that were, presumably, made in conducting the experiments from which the platted results were obtained, and if the conditions relative to the diameters and the interior sides of the different pipes that were used had been pre-

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