IMPACT PRESSURES OF FALLING JETS ON THE PLUNGING POOL BED

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FATHI MOGHADAM MANOUCHEHR; KIANI SAJAD; LASHKARARA BABAK

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Journal Paper

Paper Information

Journal: JOURNAL OF WATER AND SOIL RESOURCES CONSERVATION Year:2017 | Volume:6 | Issue:3 Page(s): 77-87

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Title

IMPACT PRESSURES OF FALLING JETS ON THE PLUNGING POOL BED

Author(s)

FATHI MOGHADAM MANOUCHEHR | KIANI SAJAD | LASHKARARA BABAK | Issue Writer Certificate

Keywords

DAM SPILLWAYQ1

FALLING JETQ1

FROUDE NUMBERQ1

PLUNGING POOLQ1

ROUGH SURFACEQ1

Abstract

Plunging pools are constructed at the downstream of DAM SPILLWAYs to dissipate the excess energy. The turbulent flow velocity converts to the dynamic pressure due to impact of flow with the pool’s bed. The aim of this research is to determine impact pressure of a vertical jet on PLUNGING POOL bed. Hence, the experiments were carried out in four different discharges (ranging from 6 to 27.5 lit/s according to the nozzle diameters), three jet diameters including 4.3, 5.2 and 8.2 cm and four falling heights of 37, 60, 90 and 120 cm. Also the experiments are conducted in similar flow conditions for smooth and ROUGH SURFACEs, and results are compared. Dynamic pressures were measured with a pressure transducer. The analysis of data showed that increase of jet diameter causes decrement in the dynamic pressure coefficient. Results revealed an increase in dynamic pressures due to roughness of contacting surface. Moreover, variations of jet FROUDE NUMBER and fall length have significant effects on the dynamic pressure coefficient. The impact pressure was the highest in the surface center and was gradually reduced in outer zones.

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APA: Copy

FATHI MOGHADAM, MANOUCHEHR, KIANI, SAJAD, & LASHKARARA, BABAK. (2017). IMPACT PRESSURES OF FALLING JETS ON THE PLUNGING POOL BED. JOURNAL OF WATER AND SOIL RESOURCES CONSERVATION, 6(3), 77-87. SID. https://sid.ir/paper/232142/en

Vancouver: Copy

FATHI MOGHADAM MANOUCHEHR, KIANI SAJAD, LASHKARARA BABAK. IMPACT PRESSURES OF FALLING JETS ON THE PLUNGING POOL BED. JOURNAL OF WATER AND SOIL RESOURCES CONSERVATION[Internet]. 2017;6(3):77-87. Available from: https://sid.ir/paper/232142/en

IEEE: Copy

MANOUCHEHR FATHI MOGHADAM, SAJAD KIANI, and BABAK LASHKARARA, “IMPACT PRESSURES OF FALLING JETS ON THE PLUNGING POOL BED,” JOURNAL OF WATER AND SOIL RESOURCES CONSERVATION, vol. 6, no. 3, pp. 77–87, 2017, [Online]. Available: https://sid.ir/paper/232142/en

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