Sharp-crested weir head losses investigation
Journal Title: Вісник Одеської державної академії будівництва та архітектури - Year 2017, Vol 1, Issue 66
Abstract
The work is devoted to the sharp-crested weir calculation methods improvement. This can be realized by using mathematical model developed on energy and momentum conservation principles. In order to get energy conservation law within sharp-crested weir we need to study head losses and this article presents theoretical and experimental investigations of the sharp-crested weir head losses. The height of the overflow wall св and head H are estimated as main operating factors that determine hydraulic weir outbound parameters: threshold depth h and the specific weir flow q. The flow moving across sharp-crested weir suffers abrupt vertical contraction and transforms from the steady flow to the nappe. The above mentioned causes sharp-crested weir head losses. To determine these losses, we propose to use Hind`s equation that describes similar contraction losses in the channel. Experimental investigations proved Hind`s equation application adequacy to evaluate these losses. An energy equation for sharp-crested weir that include head losses is determined. Graphs set out in the article disclose the influence of the main operating factors and their ratio on the fractional head losses.
Authors and Affiliations
V. I. , Korniichuk, M. M. , Khlapuk, A. V. , Bezusyak
Keywords
Related Articles
- EP ID EP317596
- DOI -
- Views 127
- Downloads 0
Sharp-crested weir head losses investigation
The work is devoted to the sharp-crested weir calculation methods improvement. This can be realized by using mathematical model developed on energy and momentum conservation principles. In order to get energy conservatio...
The pipeline monitoring
Experience of monitoring of high pressure gas pipeline laid on steep slope area above the underground workings is outlined. For research the geodetic reference network consisting of four points was established on the sit...
System for balancing operating modes of three-phase four-current electrical network of administrative building with a kinetic energy storage
The purpose of the article is to develop a balancing device with a kinetic energy storage for the power supply system of the administrative building, which will lead to an improvement of the quality of electricity in low...
The improvement of crack resistance of concrete dispersive reinforced with polypropylene fiber by technological factors
The purpose of the work is research of the efficiency of dispersed reinforcement with polypropylene fiber to improve the concrete crack resistance according to the criteria of fracture mechanics, using mathematical plann...
{Methods and development analysis of a way for determining the efficiency of wooden structures fire protection
A literature review and analysis of fire protection means of wooden structures has been carried out. It has been established that there is a certain amount of rapid methods for determining fire-protection efficiency, whi...