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VOLUME XII Edisi 1 , April 2007
TINJAUAN ENERGI SPESIFIK AKIBAT PENYEMPITAN PADA SALURAN TERBUKA |
Jurusan Teknik Sipil Fakultas Teknik UKRIM Yogyakarta |
Open channel configuration is found in man-made water conduits such as irrigation channels and trenches as well as naturally occurring water conduits such as rivers. He narrowing of open channel conduits due to various reason leads to the transformation of the cross-sectional area of the channel from prismatic to non-prismatic, causing a flow pattern which is more difficult to analyze than that in a prismatic section. In order to observe the effect of reduces cross-section on the specific energy of a flow, a physical model of an open conduits with reduces cross-section has been made in the laboratory of Universitas Kristen Immanuel, Yogyakarta. The channel was 26.5 cm wide. In one experiment, the width was reduced to 16 cm at a point along the channel and water was passed at a discharge rate of 5.5 x 10-4 m3/sec. measurements were carried out on the height of the flow at the reduced section as well as the rate of discharge, from which the Froude number was determined to identify the flow type. From the same measurement the specific energy parameter was also determined. Measurements were also made for flow at discharge rate of 1.26 x 10-3 m3/sec and 2.6 x 10-3 m3/sec, respectively. The same experiment were conducted with reduce cross-section of 10 cm and 5 cm. |
specific energy , open channel |
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