Onderwerp: Bezoek-historie

A study concerning the influence of the relative turbulence intensity on local-scour holes

Dit onderwerp bevat de volgende rubrieken.


G.J.C.M. Hoffmans; Ministery of Transport Public Works and Watermanagement, Road and Hydraulic Engineering Division



The prediction of local-scour holes that develop downstream from hydraulic structures plays an important role in their design. Excessive local scour can progressively undermine the foundation of a sructu re. Because complete protection against scour is too expensive generally, the maximum scour-depth and the upstream slope of the scour hole have to be predicted to minimize the risk of failure. The modified scour formula yields results that compare reasonably well to measured and computed developments of a scour hole in case of a uniform flow upstream of the scour hole corresponding with a large protected bed are a. The computations were based on the two-dimensional Navier-Stokes and convection-diffusion equations. The present paper aims at extension o f the domain of application of the scour formula to non-uniform flow conditions upstream.



29 p.

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