Hydraulic Tables, Coefficients & Formulae: For Finding the Discharge of Water from Orifices, Notches, Weirs, Pipes & RiversWeale, 1861 - 455 |
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acre Altitudes angle average bends Bossut bottom Buât Buât's c₁ calculated catchment catchment basin cent channel coefficient of discharge coefficient of velocity contraction cost cubic feet cubic foot cylinder engine cylindrical d₁ d₂ diagram diaphragm discharge in cubic districts Ditto drainage Du Buât effect engine equal equation erogation experiments feet deep feet per minute feet per second find the discharge foot formula gallons gauge give given h Coefficient h₁ head due hydraulic inclination hydraulic mean depth inches per second increase Interpolated junction length loss of head main drain maximum mean velocity measures in English minor drains nearly notch orifice of entry quantity of water rain rain-fall ratio rectangular reservoir resistance Revolutions per minute river River Robe sewers short tube side slopes square mile submain supply thin plate turbine vary velocity of approach velocity of discharge water wheels weir wheel yards
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Strona 447 - CUBIC MEASURE 1728 cubic inches = 1 cubic foot 27 cubic feet = 1 cubic yard...
Strona 124 - HJ, where Q is the quantity of water in cubic feet per minute, and H the head as measured vertically in inches from the still water level of the pool down to the vertex of the notch. This formula is submitted at present temporarily, as being accurate enough for use for ordinary practical purposes, for the measurement of water by notches similar to the one experimented on, and for quantities of water limited to nearly the same range as those in the experiments ; but as being, of course, subject to...
Strona 119 - ... for many purposes suitable and convenient. They are, however, but ill adapted for the measurement of very variable quantities of water, such as commonly occur to the engineer to be gauged in rivers and streams.
Strona 374 - ... the effect, therefore, of overshot wheels, under the same circumstances of quantity and fall, is at a medium double to that of the undershot : and, as a consequence thereof, that non-elastic bodies, when acting by their impulse or collision, communicate only a part of their original power ; the other part being spent in changing their figure, in consequence of the stroke. The powers of water, computed from the height of the wheel...
Strona 121 - ... and laterally, so as to form a bottom to the channel of approach, which will both be smooth and will serve as the lower bounding surface of a passage of approach, unchanging in form, while increasing in magnitude at the places, at least, which are adjacent to the vertex of the notch. The floor may...
Strona 123 - ... water above the vertex of the notch, I would anticipate that the quantities flowing would still be, approximately at least, proportional to the £-power of the head as before ; and a set of coefficients would have to be determined experimentally for different ratios of the height of the head water to the height of the tail water above the vertex of the notch.
Strona 121 - In the notches now proposed, of triangular form, the influence of the bottom may be rendered definite, and such as to affect alike (or, at least, by some law that may be readily determined by experiment) the flow of the water when very small, or very great, in the same notch.
Strona 382 - ... velocity of the circumference is made the same as the velocity of the entering water, and thus there is no impact between the water and the wheel ; but, on the contrary, the water enters the radiating conduits of the wheel gently, that is to say, with scarcely any motion in relation to their mouths. In order to attain the equalization of these velocities, it is necessary that the circumference of the wheel should move with the velocity which a heavy body would attain in falling through a vertical...
Strona 235 - ... Neville's rule in this way : " Describe any circle on the drawing board; draw the diameter and produce it on both sides ; draw a tangent to the lower circumference parallel to this diameter, and then draw side slopes at the given inclinations, touching the circumference on each side and terminating in the parallel lines. The trapezoid thus formed will be the best form of channel, and the width at the surface will be equal to the sum of the two side slopes.