HYDRAULICS. ENGINEERING HYDROLOGY. HYDRAULIC ENGINEERING

REFINEMENT OF METHODS OF CALCULATION OF HYDRAULIC RESISTANCE COEFFICIENT FOR SMOOTH OPEN CHANNELS

Vestnik MGSU 1/2017 Volume 12
  • Volgin Georgiy Valentinovich - Moscow State University of Civil Engineering (MGSU) Head of “Hydraulics and Hydromechanics” Scientific & Research Laboratory, Head of “Water Engineering” Research Education Center, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 94-98

One of the main tasks of an engineer in design of hydraulic structures is to perform an accurate calculation of losses in a moving flow of liquid, whether that be a head conduit or open channel. Modern technologies make it possible to obtain construction materials enabling to reduce resistance in motion of liquid. Thus, the shifting of motion mode from hydraulically rough into the sphere of hydraulically smooth resistance takes place. In this regard, there is a need for improvement of methods for hydraulic resistance coefficient calculation. The analysis of existing methods for calculating the hydraulic resistance coefficient was performed. Reasons for necessity of the search of modern methods for calculation of this parameter were grounded. The data array that meets the requirements of the task was received using the modern equipment. The analysis of experimental results illustrating the influence of Reynolds number and Froude number, and of ratio of the channel width to the flow depth on the hydraulic resistance coefficient was performed. The revised method of calculating the coefficient of hydraulic resistance of smooth open channels is proposed.

DOI: 10.22227/1997-0935.2017.1.94-98

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