Treatise on Hydraulics

by Mansfield Merriman

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt: ...c= 97 100 102 104 105 105 and the following are values for cylinder jointed pipes: Velocity, feet per second, v--1 2 3 4 5 6 for 3.0 feet diameter, c= 86 95 103 111 117 124 for 4.0 feet diameter, C = 1o1 109 113 113 112 112 The following values were derived by Marx, Wing, and Haskins from their gagings of a 6-foot steel riveted pipe with cylinder joints: and the increase in roughness of the surface during two years' use is indicated by the decrease in c or by the increase in n. For wooden stave pipes the gagings of Noble and those of Marx, Wing, and Haskins, already referred to in Art. 101, furnish the following values of the coefficients c, those given for the 6-foot diameter in the first line being for new pipe, and those in the second line after two years' use: Here the two values in parentheses have been found by a graphic discussion of the results of the observations. For the first of these pipes the value of Kutter's n ranges from 0.013 to 0.012, while for the second and third it is practically constant at 0.013. Prob. 114. Compute the discharge of a new steel riveted pipe with cylinder joints, and also that of a wooden pipe, the length of each being 6490 feet, the head 37 feet, and the diameter 60 inches. Compute also the probable discharge after two years' use. Art. 115. Bazin's Formula In 1897 Bazin proposed a formula for open channels as the result of an extended discussion of the most reliable gagings. In it the coefficient c is expressed in terms of the hydraulic radius and the roughness of-the surface, but the slope does not enter. It is /--87 v = cVrs c=-._ (115) 0.552 ] m/Vr This is for English measures, r being in feet and v in feet per second, and the quantity m has the following values: w = o.06 for smooth cement or matched boards, m =0.16... Read Less

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt: ...c= 97 100 102 104 105 105 and the following are values for cylinder jointed pipes: Velocity, feet per second, v--1 2 3 4 5 6 for 3.0 feet diameter, c= 86 95 103 111 117 124 for 4.0 feet diameter, C = 1o1 109 113 113 112 112 The following values were derived by Marx, Wing, and Haskins from their gagings of a 6-foot ... Read More