Publication
Plunging circular jets : Experimental characterization of dynamic pressures near the stagnation zone
Publications associées (40)
Scaling laws for jets of single cavitation bubbles
Mohamed Farhat, Nicolas Dorsaz, Danail Obreschkow, Philipp Kobel, Outi Supponen, Marc Tinguely
Fast liquid jets, called micro-jets, are produced within cavitation bubbles experiencing an aspherical collapse. Here we review micro-jets of different origins, scales and appearances, and propose a unified framework to describe their dynamics by using an ...
Cambridge University Press2016Influence of jet aeration on pressures around a block embedded in a plunge pool bottom
Anton Schleiss, Rafael Xavier Meriade Duarte
The influence of the air entrained by water jets on the dynamic pressures applied on the bottom of a plunge pool and inside underlying fissures was analyzed with systematic experiments. The large experimental facility reproduced aerated high-velocity jets ...
Springer Verlag2015Air entrainment and pressure development in skimming flow on an abrupt slope change on stepped spillways
Anton Schleiss, Michael Pfister, José Pedro Gamito de Saldanha Calado Matos, Mohammad Javad Ostad Mirza
Numerous stepped spillways were built to date, namely on RCC gravity dams or on valley flanks besides embankment or rockfill dams, while some others are currently under design or construction. In some cases, slope changes may be required on stepped chutes, ...
2015Air Entrainment in Skimming Flow on Stepped Spillways: the Effect of an Abrupt Slope Change
Anton Schleiss, Michael Pfister, José Pedro Gamito de Saldanha Calado Matos, Mohammad Javad Ostad Mirza
Numerous stepped spillways were built during the last decades. In particular, a stepped spillway may be integrated economically into the downstream face of a RCC gravity dam, or on valley flanks besides embankment or rockfill dams, where slope changes may ...
2015Influence of air entrainment on rock scour development and block stability in plunge pools
Rock scour occurring near dam foundations due to high-velocity jets of spillways impinging into the plunge pool is a major concern regarding dam safety. Scour in fractured rock resulting from high-velocity jet impact is a complex phenomenon, which involves ...
EPFL - LCH2014Trajectories and air flow features of ski jump-generated jets
Ski jumps are frequently applied as spillways of high dams. The resulting jet impact location on the plunge pool surface is often distant from the dam toe so that the latter is protected from scouring. Furthermore, the jet disintegrates and disperses prior ...
Taylor & Francis Ltd2014Air concentration distribution in deflector-jets
Michael Pfister, Sebastian Schwindt
As an alternative to ski jumps, deflectors can be implemented on spillways to generate free jets. They guide, up to a certain limit, the jet to an achieved location onto the plunge pool surface, and furthermore enhance the process of jet disintegration. Th ...
The University of Queensland2014Air concentrations in plunge pools due to aerated plunging high-velocity jets and dynamic pressures in underlying fissures
High-velocity plunging water jets, such as those formed by spillways of high-head dams, cause scour on the rock foundations. The scour process is the result of complex physical phenomena concerning the three media involved, namely, water, rock and air. Air ...
TPI2013Dynamic pressure distribution around a fixed confined block impacted by plunging and aerated water jets
Anton Schleiss, Rafael Xavier Meriade Duarte
The scour process created by the impingement of high-velocity water jets on fissured rock is the result of complex physical phenomena. Of great importance are the jet development during the trajectory through the atmosphere, the diffusion process inside th ...
TUP2013Experimental study on bedload pulses in a steep flume with boulders
High-velocity plunging water jets, such as those formed by spillways of high-head dams, cause scour on the rock foundations. The scour process is the result of complex physical phenomena concerning the three media involved, namely, water, rock and air. Air ...
TPU2013