Discharge formula for rectangular sharp-crested weirs

AYDIN İ., Altan-Sakarya A. B., ŞİŞMAN Ç.

FLOW MEASUREMENT AND INSTRUMENTATION, cilt.22, sa.2, ss.144-151, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 22 Sayı: 2
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.flowmeasinst.2011.01.003
  • Dergi Adı: FLOW MEASUREMENT AND INSTRUMENTATION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.144-151
  • Anahtar Kelimeler: Flow measurement, Sharp crested weirs, Rectangular weir, Discharge measurement, Open channel flow, SLIT WEIR
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Sharp-crested rectangular weirs used for discharge measurement in channels and laboratories are experimentally investigated. Height and width of weir plate are the two parameters characterizing the head-discharge relationship. Laboratory experiments are conducted by measuring the discharge and the head over the weir for variable weir heights and widths. Applicability of various formulations for the discharge coefficient are investigated. Experiments indicate that discharge is independent of weir height, when the weir is operated within an appropriate discharge range. Average velocity over the weir plotted against the weir head displays universal characteristics such that it can be used in the expression of discharge over the weir, eliminating the need for a discharge coefficient. The head-discharge relationship for a rectangular weir has distinct features for the partially contracted weirs and for the fully contracted slit weirs. (C) 2011 Elsevier Ltd. All rights reserved.