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Products  |  Fluid Mechanics and Hydrology  |  Hydrology and Hydraulic Engineering  |  HM 160  |  HM 160.31
HM 160.31 Broad Crested Weir Show data sheet (pdf file) Print page
Technical Description
The broad crested weir is one of the fixed weirs. Normally the water flows over the weir without the down-stream level being below the weir crest. If this is the case, such a weir is termed an underwater weir. The experimental set-up is placed on the base of the flume and is fixed in place with a bolt. The weir body is made of plastic. By turning the weir body, it is possible to choose between a sharp edged and a rounded overflow edge. Tubular seals inserted in slots on the weir body complete the experimental set-up. In practice, broad crested weirs are used as so-called submerged dikes.
Learning Objectives / Experiments
In conjunction with the HM 160, the following experiments are possible:
· Flow rate measurements on a broad crested weir
· Comparison of perfect and imperfect overshoot
· Burble and cavitation
· Boundary state between flow and supercritical flow on a broad crested weir


For the exact measurement of water levels, the HM 160.52 Level Gauge is recommended.
Features
· Flow behaviour on an underwater weir
Specification
[1] Weir body for inserting in the HM 160 Multi-Purpose Teaching Flume
[2] Weir body made of plastic, lxwxh 300x84x120mm
[3] Radius of the top edge 40mm
Technical Data
Radius of the top edge: 40mm
Dimensions and Weight
l x w x h: 300 x 84 x 120 mm
Weight : approx. 1.5 kg
Scope of Delivery
1 weir, 1 set of accessories,
1 instruction manual
Order Details
070.16031 HM 160.31 Broad Crested Weir
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© 2005 G.U.N.T. Gerätebau GmbH