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
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