DETERMINING THE ADEQUATE CREST
HEIGHT OF SUPPRESSED RECTANGULAR
BROAD CRESTED WEIRS UNDER SUBCRITICAL
FLOW CONDITIONS
الباحث الأول:
Hayder Mohammed Jasim
الباحثين الآخرين:
Fadhel Abdulabbas Hassan,Tagreed Hameed Khlif
المجلة:
International Journal of Civil Engineering and Technology (IJCIET)
Volume 9, Issue 7, July 2018, pp
تاريخ النشر:
None
مختصر البحث:
In this research, an experimental work was conducted on models of broad crested
weirs with different height of crest and different flow conditions, in sub – critical zone,
to derive an equation to calculate the adequate height of a broad crested w…
In this research, an experimental work was conducted on models of broad crested
weirs with different height of crest and different flow conditions, in sub – critical zone,
to derive an equation to calculate the adequate height of a broad crested weir as a
function of flow parameters such as initial depth, sequent depth, critical depth and
Froude number due to the hydraulic jump will be generated downstream the weir .
Five laboratory models were used in the experiments with crest heights of 30 cm,
35 cm, 40 cm, 45 cm, 50 cm and 55 cm. Each model will examined under different flow
values (37 l/s , 31 l/s, 26 l/s, 11 l/s and 6 l/s.). All experiments were conducted in a
laboratory flume with dimensions of (1 m * 1.15 m) in cross section and 18 m length.
The flow conditions and geometric parameters of laboratory models were
rearranged as a non-dimensional parameters using Л – theorem. The values of each Л
will be scheduled and analyzed by the software of SPSS -21 to derive an empirical
formula to calculate the non-dimensional height of crest. The value of the coefficient of
determination (R2) resulted from the non-linear regression of data to derive the nondimensional
formula was very high.
