Unsteady Flow Simulation at Pumping Station in the End of Supply Pipe

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Khoshfetrat A.; DANESHFARAZ R.; BEHMANESH J.

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Paper Information

Journal: WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE) Year:2019 | Volume:29 | Issue:2 Page(s): 43-56

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Title

Unsteady Flow Simulation at Pumping Station in the End of Supply Pipe

Author(s)

Khoshfetrat A. | DANESHFARAZ R. | BEHMANESH J. | Issue Writer Certificate

Keywords

Field dataQ1

SimulationQ1

Transient flowQ2

Unsteady VitkovskyQ3

Water hammerQ1

Abstract

Investigation of the unsteady flow has an important role in water conveyance systems. In the present study water conveyance system including the storage tank, pumping station and pipeline was studied to investigate the maximum pressure due to occurrence of Transient flow conditions. The transient condition was started by cutting the power of pumps and in a short time period, the change of flow condition was investigated in the supply collector. The friction losses in transient condition were calculated using Bentley Hammer software. In this process, four methods including steady, quasi steady, unsteady and Unsteady Vitkovsky states were used. The pressure was measured by using a fast and sensitive pressure gauge and the observed results were compared with the Simulation results and in this process the statistical methods were used. The results showed that there was not time correspondent between the period of cycles. The least amount of error for pressure, gained by method of Unsteady Vitkovsky, is equal to 7. 07m water at initial times and 11. 79 m water in data logging period. For the maximum pressure values, maximum difference was obtained by use of unsteady method and the minimum difference by the two methods of steady and quasi steady methods. The maximum difference for the minimum pressure value was obtained for steady and Unsteady Vitkovsky methods at initial and ulterior, respectively and its minimum difference was calculated for unsteady method. Increasing wave velocity had a direct effect on the maximum pressures and an inverse impact on the minimum pressures.

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APA: Copy

Khoshfetrat, A., DANESHFARAZ, R., & BEHMANESH, J.. (2019). Unsteady Flow Simulation at Pumping Station in the End of Supply Pipe. WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE), 29(2 ), 43-56. SID. https://sid.ir/paper/147772/en

Vancouver: Copy

Khoshfetrat A., DANESHFARAZ R., BEHMANESH J.. Unsteady Flow Simulation at Pumping Station in the End of Supply Pipe. WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE)[Internet]. 2019;29(2 ):43-56. Available from: https://sid.ir/paper/147772/en

IEEE: Copy

A. Khoshfetrat, R. DANESHFARAZ, and J. BEHMANESH, “Unsteady Flow Simulation at Pumping Station in the End of Supply Pipe,” WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE), vol. 29, no. 2 , pp. 43–56, 2019, [Online]. Available: https://sid.ir/paper/147772/en

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