The Discharge Coefficient for a Compound Sharp Crested V-Notch Weir
Keywords:V-notch Weir, Weir Design, Hydraulic structures, Discharge Measuring Structures
This paper presents experimental work to investigate the discharge coefficient for a compound V-notch weir. This weir is composed of two triangular parts with distinctive notch angles. Fundamental standards were utilized to connect the release to the significant geometrical and hydraulic parameters in non-dimensional form. Physical model tool was used, where more than 30 runs were executed in a rectangular flume. Five weir models were tested representing different weir characteristics. The outcomes were contrasted with previous work, the discharge coefficients were found in a decent concurrence with the comparable compound sharp-crested weir. The study demonstrated the principle point of preference of the proposed compound weir to allow a decent exactness in the flow measurement for a varied range of flows with no cutoffs as well.
Martinez, J., Reca, J., Morillas, M. T., and LÃ³pez, J. G., â€œDesign and calibration of a compound sharp-crested weirâ€ J. Hydraul. Eng., Vol. 131, no. 2, P.P 112â€“116, 2005.
Emiroglu, M. E., Kaya, N., and Agaccioglu, H., â€œDischarge capacity of labyrinth side weir located on a straight channelâ€, J. Irrigat. Drain. Eng., Vol. 136, no. 1, P.P 37â€“46, 2010
Azimi, A. H., Rajaratnam, N., Zhu, D. Z. (2014) â€œSubmerged flows over rectangular weirs of finite crest length.â€ Journal of Irrigation and Drainage Engineering, ASCE, 06014001, 1-12.
Aydin, I., Metin Ger, A., and Hincal, O., â€œMeasurement of small discharges in open channels by slit weir.â€, J. Hydraul. Eng., Vol. 128, no. 2, 234â€“237, 2002.
Johnson, M. C., â€œDischarge coefficient analysis for flat-topped and sharp-crested weirs.â€, Irrig. Sci., Vol. 19, P.P 133â€“137, 2000.
Borghei, S. M., Jalili, M. R., and Ghodsian, M., â€œDischarge coefficient for sharp-crested side weir in subcritical flowâ€, J. Hydraul.Eng., Vol. 125, no. 10, P.P 1051â€“1056, 1999.
Bos, M. G., Discharge measurement structures, International Institute for Land Reclamation and Improvement, Wagemingen, The Netherlands, 1976.
Kindsvater, C. E., and Carter, R. W., â€œDischarge characteristics of rectangular thin-plate weirsâ€, Trans. Am. Soc. Civ. Eng., Vol. 124, P.P 772â€“822, 1959
Aydin, I., Altan-Sakarya, A. B., and Sisman, C., â€œDischarge formula for rectangular sharp-crested weirsâ€, Flow Meas. Instrum., Vol. 22, no. 2, 144â€“151, 2011
El-Hady, R. M. A., â€œ2D-3D modeling of flow over sharp-crested weirsâ€, J. Appl. Sci. Res., Vol. 7, no.12, P.P 2495â€“2505, 2011.
Azimi, A. H., Rajaratnam, N., Zhu, D. Z., â€œA Note on Sharp-crested Weirs and Weirs of Finite Crest Length.â€ Canadian Journal of Civil Engineering, CSCE, Vol. 39, no. 11, pp. 1234-1237, 2012.
Hubert, C. and Hang, W., Unsteady Discharge Calibration of A Large V-Notch Weiâ€, School of Civil Engineering, The University of Queensland, Brisbane QLD 4072, AUSTRALIA, Report No. CH88/12, 51P, 2012.
Ranga Raju, K. G., and Asawa, G. L., â€œViscosity and surface tension effects on weir flow.â€, J. Hydr. Div., vol. 103, no. 10, P.p 1227â€“1231, 1977.
Kandaswamy, P. K., and Rouse, H., â€œCharacteristics of flow over terminal weirs and sillsâ€, J. Hydr. Div., vol. 83, no. 4, P.P 1â€“13, 1957.
Prakash Shesha M. N., and Shivapur A. V., â€œGeneralized Head-Discharge Equation for Flow over Sharp-Crested Inclined Inverted V-Notch Weirâ€, J. Irrig. Drain Eng., vol. 130, no. 4, P.P 325-330, 2004.
Bagheri, S., and Heidarpour, M., â€œFlow over rectangular sharp crested weirs.â€ Irrig. Sci., vol. 28, no.2, P.P 173â€“179, 2010
Jan, C. D., Chang, C. J., and Lee, M. H., â€œDiscussion of â€˜Design and calibration of compound sharp-crested weirâ€™ by J. Martinez et al.â€, J. Hydraul. Eng., vol. 132 no.8, P.P 868â€“871, 2006.
GÃ¶ÄŸÃ¼s, M., Define, Z., and Ã–zkandemir, V., â€œBroad-crested weirs with rectangular compound cross sectionsâ€, J. Irrig. and Drain. Eng., vol. 132, no.3,P.P 272â€“280, 2006.
Ibrahim M., â€œBed profile downstream compound sharp crested V-notch weirâ€, AEJ - Alexandria Engineering Journal vol. 54, P.P 607â€“613, 2015.
El-Alfy, K. M., â€œEffect of vertical curvature of flow at weir crest on discharge coefficientâ€, in proceeding of 9th Int. Water Technology Conf., UNESCO Cairo Office and FAO Cairo Office, Cairo, Egypt, P.P 249â€“262, 2005.
Henderson, F. M., Open channel flow, Prenticeâ€“Hall, Englewood Cliffs, N.J., 1966.
LMNO Engineering Research and Software-Ltd., Focus on open channel flow measurement: V-notch weirs, Newsletter, Vol. 1, Athens, Ohio, 1999.
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