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عمران::
قوس پرش اسکی
Different names are used by authors and designers in various countries to describe structures that employ hydraulic action of jet trajectory to accomplish energy dissipation; ski jump bucket, flip bucket, trajectory bucket, free jet spillways, and free over-falls.
However, in the opinion of the author, the term trajectory bucket covers all these structures, which could be further classified as ski jump buckets, flip buckets, and free jet spillways.
In line with the original version of the saut de ski structures, the ski jump buckets are those located considerably above the river bed, with or without the power house below the bucket as shown in Figure 1.
In a ski jump bucket, although the jet is subjected to air resistance and entrainment, the objective is to have it impinge at as large a distance as attainable so that the main dam is not endangered by the scour caused by the jet.
Figure 1 Ski jump buckets.
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