Transactions of the American Society of Civil Engineers, Volume 47American Society of Civil Engineers., 1902 - Civil engineering Vols. 29-30 contain papers of the International Engineering Congress, Chicago, 1893; v. 54, pts. A-F, papers of the International Engineering Congress, St. Louis, 1904. |
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abscissas Alexandrine tangent arithmetic means average axis Bazin blow-off Brady Tangent Calibrations canal cock Column compound curve computed connection correction cross-section current meter curvature curve section Darcy diam differential gauge discharge distortion down-stream effect Engineering equation error experimental experiments Fahr feet per second Fenkell flow of water formula friction gate Haskell Hastings Street horizontal hose Hubbell hydraulic hydrometer Inches of Kerosene Inches of Oil inlet instrument June length loss of head maximum velocity mean velocity measured Messrs motion normal conditions observations obtained orifice Piez piezometer Pitot tube plotted point and pressure pressure openings radius curve ratio readings reduced resistance Rivard Rowena Saph and Schoder side Small Price specific gravity sperm oil straight pipe stream Street tangent surface Table taken temperature tion traverses turns open Tutton variation velocity curve velocity head Venturi meter vertical viscosity weir writers
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Page 273 - ... gradually retarded by the friction, and would flow out and down, in long spirals of gradually diminishing pitch, to again rise in the center. Now, as the average forward velocity of the water must in all cases be the same (provided the area of the pipe is unchanged), it follows that this spiral motion must give an increased actual velocity to the water proportional to the secant of the average angle which the different threads of the stream make with the axis of the pipe, and, as the energy of...
Page 367 - ... Received July 31, 1928.) Experimental work due to Prof. J. Eustice* has shown that there is no marked critical velocity for a fluid flowing through a curved pipe. If the pipe is straight there is a sudden increase in the loss of head as soon as the velocity exceeds its critical value ; below the critical the loss of head varies as the first power of the velocity, but above it approximately as the second power. But if the pipe is curved there does not appear to be such a sudden change at any velocity...
Page 191 - The presentation of a series of coefficients for application to the different fluids used in the fluid differential gauges, by which the observations so taken may be conveniently reduced to equivalents in water. E. — The demonstration of the fact that ratings of Pitot tubes made by dragging those instruments through still water in open troughs do not conform, within any reasonable limits, to those obtained when the instrument is stationary in moving water in a closed conduit.
Page 174 - ... which each of the inside faces approximates the frustum of a cone; the exterior confining wall assuming the form of a circular zone. The disc has a single slot projecting radially from the ball, which embraces a fixed metallic diaphragm set within and crosswise of one side of the chamber, the discs being thus prevented from rotating; but, when it is caused to oscillate in contact with the cone frustums, the chamber, by these means, is divided into sub-compartments or measuring spaces. Now, if...
Page 192 - Freeman, Members, Am. Soc. C. E., and Mr. Hiram F. Mills, for friendly encouragement and kindly suggestions given during the progress of the work; To their old friends and former instructors, Charles E. Greene and Joseph B. Davis, Members, Am. Soc. CE , and Professor Mortimer E. Cooley, of the Engineering Department of the University of Michigan, for the early training in analysis, observation and experiment, to which, in large measure, the outcome of these investigations has been due; And last,...
Page 3 - In addition to the curriculum as taught in the average rural school, concrete, tangible things are presented at such times and in such a manner as not to interfere with the regular work; in fact, zest and enthusiasm is added thereto.
Page 13 - ... the normal impulse of water against a plane surface is equal to the weight of a column of water whose base is equal to the cross-section of the stream, and whose height is twice the head of water to which the velocity is due.
Page 3 - Some of these secondary questions have proved of almost, if not quite, as great interest as the main question, but the fact is not to be lost sight of that the effect of curvature was the subject chiefly under consideration.
Page 204 - ... with tubercles, the mean ratio was 0.809. In another penstock, 6.5 ft. in diameter, with rivets and plates arranged as before, but with the surface coated with coal-tar pitch and quite smooth, in a series of twelve experiments, with a mean velocity averaging 3.615 ft. per second, the ratio averaged 0.846. Another penstock, 6.5 ft. in diameter, with a surface somewhat rougher than the last, in a series of fourteen experiments, with an average mean velocity of 2.029 ft. per second, gave an average...
Page 192 - In closing, the writer's desire to acknowledge their indebtedness: To the Board of Water Commissioners of the City of Detroit, for the opportunities afforded for making these observations; To EA Fuertes, M. Am. Soc. CE, Director and Dean of the College of Civil. Engineering of Cornell University, for the use of the...