The Discharge Coefficient for a Compound Sharp Crested V-Notch Weir
Keywords:
V-notch Weir, Weir Design, Hydraulic structures, Discharge Measuring StructuresAbstract
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.
Â
References
Martinez, J., Reca, J., Morillas, M. T., and López, J. G., “Design and calibration of a compound sharp-crested weir†J. Hydraul. Eng., Vol. 131, no. 2, P.P 112–116, 2005.
Emiroglu, M. E., Kaya, N., and Agaccioglu, H., “Discharge capacity of labyrinth side weir located on a straight channelâ€, J. Irrigat. Drain. Eng., Vol. 136, no. 1, P.P 37–46, 2010
Azimi, A. H., Rajaratnam, N., Zhu, D. Z. (2014) “Submerged flows over rectangular weirs of finite crest length.†Journal of Irrigation and Drainage Engineering, ASCE, 06014001, 1-12.
Aydin, I., Metin Ger, A., and Hincal, O., “Measurement of small discharges in open channels by slit weir.â€, J. Hydraul. Eng., Vol. 128, no. 2, 234–237, 2002.
Johnson, M. C., “Discharge coefficient analysis for flat-topped and sharp-crested weirs.â€, Irrig. Sci., Vol. 19, P.P 133–137, 2000.
Borghei, S. M., Jalili, M. R., and Ghodsian, M., “Discharge coefficient for sharp-crested side weir in subcritical flowâ€, J. Hydraul.Eng., Vol. 125, no. 10, P.P 1051–1056, 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., “Discharge characteristics of rectangular thin-plate weirsâ€, Trans. Am. Soc. Civ. Eng., Vol. 124, P.P 772–822, 1959
Aydin, I., Altan-Sakarya, A. B., and Sisman, C., “Discharge formula for rectangular sharp-crested weirsâ€, Flow Meas. Instrum., Vol. 22, no. 2, 144–151, 2011
El-Hady, R. M. A., “2D-3D modeling of flow over sharp-crested weirsâ€, J. Appl. Sci. Res., Vol. 7, no.12, P.P 2495–2505, 2011.
Azimi, A. H., Rajaratnam, N., Zhu, D. Z., “A Note on Sharp-crested Weirs and Weirs of Finite Crest Length.†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., “Viscosity and surface tension effects on weir flow.â€, J. Hydr. Div., vol. 103, no. 10, P.p 1227–1231, 1977.
Kandaswamy, P. K., and Rouse, H., “Characteristics of flow over terminal weirs and sillsâ€, J. Hydr. Div., vol. 83, no. 4, P.P 1–13, 1957.
Prakash Shesha M. N., and Shivapur A. V., “Generalized 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., “Flow over rectangular sharp crested weirs.†Irrig. Sci., vol. 28, no.2, P.P 173–179, 2010
Jan, C. D., Chang, C. J., and Lee, M. H., “Discussion of ‘Design and calibration of compound sharp-crested weir’ by J. Martinez et al.â€, J. Hydraul. Eng., vol. 132 no.8, P.P 868–871, 2006.
Göğüs, M., Define, Z., and Özkandemir, V., “Broad-crested weirs with rectangular compound cross sectionsâ€, J. Irrig. and Drain. Eng., vol. 132, no.3,P.P 272–280, 2006.
Ibrahim M., “Bed profile downstream compound sharp crested V-notch weirâ€, AEJ - Alexandria Engineering Journal vol. 54, P.P 607–613, 2015.
El-Alfy, K. M., “Effect 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 249–262, 2005.
Henderson, F. M., Open channel flow, Prentice–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.
Downloads
Published
Issue
Section
License
- Papers must be submitted on the understanding that they have not been published elsewhere (except in the form of an abstract or as part of a published lecture, review, or thesis) and are not currently under consideration by another journal published by any other publisher.
- It is also the authors responsibility to ensure that the articles emanating from a particular source are submitted with the necessary approval.
- The authors warrant that the paper is original and that he/she is the author of the paper, except for material that is clearly identified as to its original source, with permission notices from the copyright owners where required.
- The authors ensure that all the references carefully and they are accurate in the text as well as in the list of references (and vice versa).
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Attribution-NonCommercial 4.0 International that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
- The journal/publisher is not responsible for subsequent uses of the work. It is the author's responsibility to bring an infringement action if so desired by the author.
