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Date
2002-11Type
- Journal Article
ETH Bibliography
yes
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Abstract
Undular hydraulic jumps in circular conduits are considered with an experimental approach. Based on previous findings in rectangular channels, this research indicates differences in terms of shape effects. All present results depend on the filling ratio of the upstream conduit flow in addition to the upstream Froude number. The results include information on the wave crests and troughs, wave lengths, and generalized axial surface profiles. The wall surface profile is shown to be similar to the axial wave profile, but with smaller wave extrema and a wave shift. The design of conduits containing undular jumps should be avoided because of unstable flow. It is also demonstrated that conduits may choke in the presence of undular jumps, with a previously established choking number relating to a design limit. For flows with choking numbers in excess of 1, choking occurs associated with a transition from the free surface to the pressurized conduit flow. Show more
Publication status
publishedExternal links
Journal / series
Journal of Hydraulic EngineeringVolume
Pages / Article No.
Publisher
American Society of Civil EngineersOrganisational unit
03820 - Boes, Robert / Boes, Robert
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ETH Bibliography
yes
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