Effect of Hydraulic Characteristics on Fluid Transients Analysis under Different Types of Control Valves

• Autorzy: Al-Zaidi Basim M. , Ismaeel Abaas J.

Identyfikatory

DOI

10.12911/22998993/154731

• Języki publikacji: EN

Abstrakty

EN

In this study, several types of valves were used to study the impact of the valves types and closure characteristics on fluid transients. The valve closure curves, which are the variation of the effective valve opening as a function of percentage opening area, were derived for different selected valves. Six different types of valves were selected to study the effect of the valves types on fluid transient conditions. For simplification, a very simple pipeline system was assumed and presented in this study. The system is about two pipes connected in a series junction and they take the water from a constant-level reservoir at upstream and a valve at downstream. The duration of valve closure was taken as six seconds which plays an important role in the pressure development in the system. A method of characteristics is applied to compute the transient conditions under gradual closure of the valves. Valve data of various forms were compiled and reported as discharge and headloss coefficients as a function of valve opening. The effect of valve geometry and operation on the relative valve opening were compared. Discharge and headloss coefficients were also compared between valve types. The study concluded that transient conditions depend on the valve type. The comparison between the results of all valve types indicated that the changes in pressure and discharges depend on valve type where there is a difference in effective valve opening. It can be concluded that the valve with the highest value of valve effective opening has less effect on transient conditions, i.e., the faster changes of effective valve opening the larger the effect on transient conditions (discharge and the greater the magnitude of the pressure wave). This study would help to select the property valve in pipeline design.

Słowa kluczowe

EN

hydraulic characteristics; fluid transients; valve

• Wydawca: Polskie Towarzystwo Inżynierii Ekologicznej ; Lublin University of Technology
• Czasopismo: Journal of Ecological Engineering
• Rocznik: 2022
• Tom: Vol. 23, nr 12
• Strony: 111--123
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Al-Zaidi Basim M.

• Civil Engineering Department, College of Engineering, University of Thi-Qar, Thi-Qar, Iraq

• https://orcid.org/0000-0002-3982-5398

autor

Ismaeel Abaas J.

• Civil Engineering Department, College of Engineering, University of Thi-Qar, Thi-Qar, Iraq

Bibliografia

• 1. Ali N.A., Abozeud G., Darweesh M.S. 2013. Studying of water hammer in water supply pipes network with different abnormal operation conditions (case study – Assiut city network). Journal of Engineering Sciences, Assiut University, Faculty of Engineering, 41(6), 2036–2054.
• 2. Chaudhry M. H. 2014. Applied hydraulic transients. Springer, New York, N Y.
• 3. Han Y., Shi W., Xu H., Wang J., and Zhou L. 2022. Effects of Closing Times and Laws on Water Hammer in a Ball Valve Pipeline. Water 2022, MDPI, 14(1497), 1–16.
• 4. Kodura A. 2016. An analysis of the impact of valve closure time on the course of water hammer. Archives of Hydro-Engineering and Environmental Mechanics, 63(1), 35–45.
• 5. Liou C.P. 1991. Maximum pressure head due to linear valve closure. Journal of Fluid Engineering, 113(4), 643–647.
• 6. Nerella R., Rathnam E.V. 2015. Fluid transients and wave propagation in pressurized conduits due to valve closure. International Conference on Computational Heat and Mass Transfer. Procedia Engineering, Elsevier, 127(2015), 1158–1164.
• 7. Parmakian J. 1963. Water hammer analysis. New York 14, Dover Publications.
• 8. Pires L.F.G., Ladeia R.C., and Barreto C. 2004. Transient flow analysis of fast valve closure in short pipelines. Proceedings of IPC, International Pipeline Conference, IPC 04-0367, Calgary, Alberta, Canada.
• 9. Rahmeyer W., Driskell L. 1985. Control valve flow coefficients. ASCE, Journal of Transportation Engineering, 111(4), 358–364.
• 10. Ramos H., de Almeida B.A. 2002. Parametric Analysis of Water Hammer Effects in Small Hydro Schemes. Journal of Hydraulic Engineering, 128(7), 689–696.
• 11. Tullis J. P. 1989. Hydraulics of Pipelines: pumps, valves, cavitation, transients. John Wiley & Sons, Inc.
• 12. Wylie B.E., Streeter L. 1993. Fluid Transients in the system. Prentice-Hall, Inc. Englewood Cliffs, NJ. 1993.

Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).