Sharp-crested weir head losses investigation

• Autorzy: Korniichuk V. , Khlapuk M. , Bezusyak O. , Yasinska L.

Identyfikatory

DOI

10.7862/rb.2018.3

• Języki publikacji: EN

Abstrakty

EN

The work is devoted to the rectangular 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 equation within sharp-crested weir we have to know weir head losses. This article presents theoretical and experimental investigations of the sharp-crested weir head losses. The height of the weir plate pw and weir 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 over sharp-crested weir suffers sudden vertical contraction and transforms from the uniform flow to a jet. Mentioned above, causes sharp-crested weir head losses. To determine these losses, we propose to use Hind’s formula that describes similar contraction losses in the channel. Experimental investigations proved Hind’s formula application adequacy to evaluate these losses. Sharpcrested weir energy conservation equation that includes head losses is determined. Graphs set out in the article disclose the influence of the main operating factors and their ratio on the relative head losses.

Słowa kluczowe

EN

flow energy; total head; head losses; nappe; jet flow

• Wydawca: Oficyna Wydawnicza Politechniki Rzeszowskiej
• Czasopismo: Czasopismo Inżynierii Lądowej, Środowiska i Architektury / Journal of Civil Engineering, Environment and Architecture
• Rocznik: 2018
• Tom: z. 65, nr 1
• Strony: 27--34
• Opis fizyczny: Bibliogr. 4 poz., tab., wykr.

Twórcy

autor

Korniichuk V.

• National University of Water and Environmental Engineering, Department of Hydraulic Engineering and Hydraulics, Soborna 11, 33028 Rivne, Ukraine, phone: [phone]

autor

Khlapuk M.

• NUWEE, Department of Hydraulic Engineering and Hydraulics, Soborna 11, 33028 Rivne, Ukraine, phone: [phone]

autor

Bezusyak O.

• NUWEE, Department of Hydraulic Engineering and Hydraulics, Soborna 11, 33028 Rivne, Ukraine, phone: [phone]

autor

Yasinska L.

• NUWEE, Department of Hydraulic Engineering and Hydraulics, Soborna 11, 33028 Rivne, Ukraine, phone: [phone]

Bibliografia

• [1] Herschy, R.W., Streamflow measurement. Elsevier: Amsterdam, London, New York, Third edition, 2009, p. 507.
• [2] Bruce R. Munson, Alric P. Rothmayer, Theodore H. Okiishi, Wade W. Huebsch. Fundamentals of Fluid Mechanics, 7th Edition / John Wiley & Sons, 2013, p. 796.
• [3] Kiselev P.G. Spravochnik po gidravlicheskim raschetam / P.G. Kiselev. - M.: Energiya, 1972, p. 316.
• [4] Khlapuk M.M. Udoskonalennya metodu hidravlichnoho rozrakhunku propusknoyi zdatnosti vodozlyviv z tonkoyu stinkoyu / M.M. Khlapuk, O.V. Bezusyak, V.I. Korniichuk // Visnyk NUWMEE. - 2015. - V. 3(71), p. 118-126.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).