Hydraulic engineering; a practical treatise on the principles of water pressure and flow and their application to the development of water power, including the calculation, design and construction of water wheels, turbines, and other details of hydraulic power plants (1909)
American School (Chicago, Ill.), Black, Adolph, Turneaure, Frederick Eugene, 1866- · Chicago American School of Correspondence · leaf 169
thincertain limits; and that the discharge varies with the speed. 92. Effect of Friction. If <?„ be the coefficient of velocity repre-senting the effect of friction in the arms and orifice, then, \\ ■= c„ V2ghV^ (96) instead of the theoretical expression, y, = V2gh + u,^ The expressions for the… … WATER-POWER DEVELOPMENT 83 /hen, gh VY^ gh- (100) If c,. = 1—that is, when frictional loss is not considered—e ^ 1; and 11^ = I\ = infinity, as before,velocity w^ = 1 2r//i, and the effi-ciency is 65 per cent. Thus theeffect of friction is greatly to de-crease the theoretic efficienc}.To render c^…
