不同高度混凝土模型礁上升流特性的定量研究

Quantitative analysis of upwelling current features of a artificial concrete reef with different height

通过水槽模型试验，对6种不同高度混凝土人工鱼礁模型在来流速度为13．5、23．5、33．5cm／s条件下的上升流特性进行了研究，并对上升流规模进行了定量分析。结果表明：在3种来流速度下，6种混凝土模型礁最大上升流速度为来流速度的1／30～1／25；上升流的平均速度为0．04—0．34cm／s，上升流平均速度为最大上升流速度的1／13—1／4；上升流相对高度为礁高的1．5—2．8倍；上升流相对宽度为礁宽度的1．3～6．2倍；上升流相对面积为礁迎流面面积的2．7—6．3倍。

The upwelling current characteristics of six concrete reefs with different height were studied at a velocity of 13.5 cm/s, 23.5 cm/s and 33.5 cm/s in a circular flume, and the range of upwelling field was quantitatively analyzed around the reefs. The results showed that the maximal upwelling velocity ranged from about 1/30 to 1/25 of incoming velocity in the concrete model reefs at three incoming velocities. The average upwelling velocity varied from 0. 04 cm/s to 0. 34 cm/s, equal to about 1/13 to 1/4 of the maximal upwelling velocity. The upwelling was about 0.5 to 1.8 times than the height of the reefs in relative height. The upwelling had about 1.3 to 6.2 times as the reef＇s width in the relative width. The relative square of the reefs upwelling was about 2.7 to 6.3 times of the square of reefs＇ facing the incoming.