REVIEW ON LOCAL SCOUR DUE TO JETS
REVIEW ON LOCAL SCOUR DUE TO JETS
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发表时间：
2004
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通讯作者：
Dey Doctoral
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作者：
Dey Doctoral
能量消能工消能工护坦在泄流口水平射流冲刷作用下，下游冲刷范围大，对护坦的安全构成威胁。此外，大规模的沉积冲刷沉积物由于冲击射流在一个跳水池型能量消能器影响到下游渠道的流动通道不利。由于其重要的实际意义，许多研究者对射流引起的局部冲刷问题进行了研究。本文综述了水平射流和冲击射流局部冲刷的最新研究成果，包括冲刷过程、影响冲刷的参数、冲刷的时间变化、冲刷坑内和护坦上的流速分布、边界层厚度的发展、床面切应力、冲刷计算公式和防护工程等。
The safety of an apron of the energy dissipator is threatened by the large-scale scour in the downstream of the apron due to the erosive action of a horizontal jet issuing from a sluice opening. Also, large-scale deposition of the scoured sediments due to an impinging jet in a plunging pool type energy dissipator affects the passage of flow adversely in the downstream channels. Owing to the significant practical importance, the problem of local scour due to jets has been studied by many investigators. In this paper, a comprehensive review of the up-to-date investigations on local scour due to horizontal and impinging jets is presented including all possible aspects, such as scouring process, parameters affecting scour, time variation of scour, velocity distribution on the apron and within the scour hole, development of boundary layer thickness, bed shear stress, scour estimation formulas and protection works.