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Practical Hydraulics

Practical Hydraulics


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About the Book

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. 1886 Excerpt: ... a thousand times its diameter, is termed a short pipe, and in case its length exceeds a thousand times its diameter, is termed a long pipe. Let, in Fig. 19: h=AD, the total head. hv=AB, the velocity head, or head necessary to generate the velocity v. he=B C, the entry head, or head necessary to overcome the resistances of entry. hi=hv+/ie=A C, the inlet head, or head necessary to generate the velocity, v, in the pipe, and to overcome the resistances of entry. Tif=C D, the head necessary to overcome the resist ances within the pipe. w=the measured velocity of discharge. Vi=ti& theoretical velocity due the head ht=A C. c=the coefficient of flow in a short tube (length to diameter as 3 to 1), as determined by experiment. c =c, the coefficient of velocity, as the stream, after contraction, fills the pipe. ce=the coefficient of entry. Cy=a variable coefficient for the resistances within pipes, as determined by experiment. d=internal diameter of pipe. p=perimeter or internal contour of pipe. a=area of cross section of pipe. Z=length of pipe. s=sine of slope. r=hydraulic mean radius. /=auiount of resistances to flow in the pipe. w=weight of water discharged during the time of resistance to its flow. Then there results: Equation of total head, h=hv + he + hf. (108) Equation of entry head, Ae=A--hv. (109) v2 By equation (8), velocity head, / =--. (110) Ig v' By equation (8), inlet head, hi= JL. (Ill) Ay Equation of theoretical velocity due inlet head, Substituting the value of vt of (112) in (111), Substituting the values of hi of (113), and of hv of (110) in (109), Substituting ce for--1-in (114), The work performed by the weight, w, falling vertically by the force of gravity through the distance, hj, in one second, is Y=wh/t "footpounds....


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Product Details
  • ISBN-13: 9781151794864
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 46
  • Spine Width: 3 mm
  • Width: 189 mm
  • ISBN-10: 1151794864
  • Publisher Date: 22 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 100 gr

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