<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The complexity of flow conditions at junctions amplifies significantly with supercritical flow. It is a pronounced three-dimensional two-phased flow phenomenon, where standing waves with non-stationary water surface are formed. To analyse the hydrodynamic conditions at an asymmetric right-angled junction with incoming supercritical flows at Froude numbers between 2 and 12, an experimental approach was used. For a phenomenological determination of the relations between the integral parameters of incoming flows and the characteristics of standing waves at the junction area, water surface topographies for 168 scenarios at the junction were measured using non-intrusive measurement techniques. The new, phenomenologically derived equations allow for determination of location, height and extent of the main standing waves at the junction. Research results give important information on the processes and their magnitude for engineering applications.</p></abstract>

The complexity of flow conditions at junctions amplifies significantly with supercritical flow. It is a pronounced three-dimensional two-phased flow phenomenon, where standing waves with non-stationary water surface are formed. To analyse the hydrodynamic conditions at an asymmetric right-angled junction with incoming supercritical flows at Froude numbers between 2 and 12, an experimental approach was used. For a phenomenological determination of the relations between the integral parameters of incoming flows and the characteristics of standing waves at the junction area, water surface topographies for 168 scenarios at the junction were measured using non-intrusive measurement techniques. The new, phenomenologically derived equations allow for determination of location, height and extent of the main standing waves at the junction. Research results give important information on the processes and their magnitude for engineering applications.

Water surface topology of supercritical junction flow

Laboratory for Water Turbine Machinery, Faculty of Mechanical Engineering

Journal of Hydrology and Hydromechanics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Water surface topology of supercritical junction flow"}

The complexity of flow conditions at junctions amplifies significantly with supercritical flow. It is a pronounced three-dimensional two-phased flow...

Water surface topology of supercritical junction flow

Published Online: Mar 28, 2019

Page range: 163 - 170

Received: Feb 01, 2018

Accepted: Mar 07, 2018

DOI: https://doi.org/10.2478/johh-2018-0042

Keywords
Junction, Hydraulic experimentation, Standing wave, Supercritical flow, Flow patterns

© 2019 Gašper Rak et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Water surface topology of supercritical junction flow

Published Online: Mar 28, 2019

Page range: 163 - 170

Received: Feb 01, 2018

Accepted: Mar 07, 2018

DOI: https://doi.org/10.2478/johh-2018-0042

KeywordsJunction, Hydraulic experimentation, Standing wave, Supercritical flow, Flow patterns

© 2019 Gašper Rak et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Junction, Hydraulic experimentation, Standing wave, Supercritical flow, Flow patterns