There are only three datasets found of measurements on the stagnation pressure of cavitating jets. It is known that under conditions of cavitation, the decay of the stagnation pressure decreases with jet distance (Yahiro and Yoshida 1974 Soyama and Lichtarowicz 1996). Despite the amount of research on cavitating jets, the literature does not provide a description of the velocity and stagnation development of a cavitating jet. The velocity development of a non-cavitating jet is well known, see e.g. Thus, the velocity development with jet distance is of importance for the erosion capacity of a jet. 2010).īoth the shear stresses and the stagnation pressure exerted by the jet are functions of the jet velocity. To erode/cut a cohesive sediment, the stagnation pressure exerted by a jet must be at least 6.4 cu (Nobel et al. Cohesive sediments fail when the shear stresses in a slip-surface exceed the undrained shear strength ( cu) of these sediments. clays), the shear stresses exerted by the jet are too small to erode these sediments. sands), grains are eroded from the bed by the shear stresses exerted by jet flow: the higher the shear stresses, the higher the erosion velocity. In dredging-related projects, moving jets are widely used to excavate sediments from the seabed.
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