Discharge Coefficient of a Circular-Crested Side Weir in Rectangular Channels

AbstractSide weirs are frequently used for water-level control in irrigation systems, sewer networks, and flood protection. Researches on side weirs have generally focused on determining the hydraulic characteristics of sharp-crested side weirs. A common type of this weir, which has larger capacity to pass the flow, is the circular-crested weir. To the authors’ knowledge, investigation of hydraulic features of this weir as side weir has been ignored in literature. Based on an experimental model for subcritical flow conditions and under the hypothesis of constant specific energy, the hydraulic characteristics of the circular-crested side weir with various weir heights, widths, and downstream slopes are taken into account to formulate an expression for the discharge coefficient. The results indicate that the upstream Froude number, the weir height to weir length, specific energy to the weir radius, and downstream slope of the weir are the important variables that affect the discharge coefficient of circular...

[1]  Yilmaz Muslu.  Lateral Weir Flow Model using a Curve Fitting Analysis , 2002 .

[2]  Maurizio Venutelli,et al.  Method of Solution of Nonuniform Flow with the Presence of Rectangular Side Weir , 2008 .

[3]  Ali Uyumaz.  Side Weir in Triangular Channel , 1992 .

[4]  Amruthur S. Ramamurthy,et al.  Application of Dressler Theory to Weir Flow , 1993 .

[5]  A. Kabiri-Samani,et al.  Discharge coefficient of rectangular sharp-crested side weirs, Part I: Traditional weir equation , 2014 .

[6]  D. Manivannan,et al.  Discharge Coefficient of Rectangular Side Weirs , 1994 .

[7]  T. Nadesamoorthy,et al.  Discussion of Spatially Varied Flow over Side-Weirs by Kanakatti Subramanya and Subhash Chandra Awasthy , 1972 .

[8]  W. H. Hager,et al.  Critical flow condition in open channel hydraulics , 1985 .

[9]  Masoud Ghodsian,et al.  DISCHARGE COEFFICIENT FOR SHARP-CRESTED SIDE WEIR IN SUBCRITICAL FLOW , 1999 .

[10]  Yalçın Yüksel,et al.  SIDE-WEIR FLOW IN CURVED CHANNELS , 1998 .

[11]  Kanakatti Subramanya,et al.  Spatially Varied Flow over Side-Weirs , 1972 .

[12]  Kittur G. Ranga Raju,et al.  Side Weir in Rectangular Channel , 1979 .

[13]  Giovanni De Cesare,et al.  Scale effects related to the rating curve of cylindrically crested Piano Key weirs , 2013 .

[14]  Amruthur S. Ramamurthy,et al.  Characteristics of Circular‐Crested Weir , 1993 .

[15]  Manouchehr Heidarpour,et al.  Velocity distribution over cylindrical weirs , 2006 .

[16]  F. Henderson.  Open channel flow , 1966 .

[17]  L. Escande,et al.  ETUDE DES SEUILS DÉVERSANTS À FENTE ASPIRATRICE , 1959 .

[18]  Hin-Fatt Cheong.  Discharge Coefficient of Lateral Diversion from Trapezoidal Channel , 1991 .

[19]  Amruthur S. Ramamurthy,et al.  Lateral Weir Flow Model , 1980 .

[20]  A El Khashab,et al.  Experimental Investigation of Flow Over Side Weirs , 1976 .

[21]  Pavel Novák,et al.  Models in hydraulic engineering , 1981 .

[22]  Oscar Castro-Orgaz,et al.  Critical Flow over Circular Crested Weirs , 2008 .

[23]  Ali Uyumaz,et al.  Flow Over Side Weirs in Circular Channels , 1985 .

[24]  Praxitelis A. Argyropoulos,et al.  Discussion of Spatially Varied Flow over Side-Weirs by Kanakatti Subramanya and Subhash Chandra Awasthy , 1972 .

[25]  W. Hager.  Lateral Outflow Over Side Weirs , 1987 .

[26]  Kvh Smith.  Computer Programming for Flow over Side Weirs , 1973 .

[27]  K. H. V. Durga Rao,et al.  Study of Flow Over Side Weirs Under Supercritical Conditions , 2008 .

[28]  Amruthur S. Ramamurthy,et al.  Nonlinear PLS Method for Side Weir Flows , 2006 .

[29]  Hubert Chanson,et al.  Overflow Characteristics of Circular Weirs: Effects of Inflow Conditions , 1998 .