复合礁间纵向间距的选择与URs产生的尾流范围有关。从模块的尾迹体积图可

The choice of longitudinal spacing between composite reefs is related to the range of wakes produced by URs. From the wake volume diagram of the module, it can be seen that the length of the reef’s wake is approximately twice the length of the reef. From the perspective of the velocity contour in the x-axis direction, the low-velocity or slow-flow coverage area at 3m and 4m behind the module is much larger than the velocity coverage area at 5m and 6m behind the reef. The 3 to 4 meters behind the reef is located in the core of the wake zone—inside the wake vortex, and the flow speed decreases rapidly. If the interval of the combined spoiler is set at this position, the inflow velocity of the rear reef will be much lower than the initial velocity of the velocity inlet, which will affect the overall efficiency index of the spoiler. From the perspective of the longitudinal separation of the reef, 5m and 6m behind the reef are better choices. When the longitudinal spacing is 6m, the single wake area has the largest volume, and the wake volume efficiency index formed by composite ARs is also the largest, about 2.59. The purpose of this study is to generate a larger upwelling efficiency index in the form of composite ARs to promote the exchange of upstream and downstream water layers. The longitudinal span of the upflow generated by the module is about 2.5L (Figure 10). Therefore, considering the upwelling efficiency index, the influence range and the velocity distribution in the wake area, the longitudinal spacing at 5m has the best effect. At this time, the upflow efficiency index reaches its maximum value, which is about 24.51. Therefore, when the incident angle is 0°, the lateral spacing of the composite AR group should be 1 time the width of the reef, and the longitudinal spacing should be 5/3l ~ 2L, and the upwelling and wake efficiency indexes generated at this time are optimal. Similarly, under other incident angle conditions, the choice of the horizontal and vertical spacing between AR sets depends on the range of the individual upwelling and wake regions, so as to obtain the best spacing.

The choice of vertical spacing between composite reefs is related to the tail flow range produced by URs. As can be seen from the module's tail volume map, the tail length of the reef is about twice the length of the reef. From the speed isometris in the x-axis direction, the low or slow-flow coverage area at 3m and 4m behind the module is much larger than the speed coverage area at 5m and 6m behind the reef. The reef at the back 3 to 4 meters is at the core of the tailpi belt, inside the tail vortex, and the flow rate decreases rapidly. If the interval of the combined spoiler is set at this position, the inlet speed of the rear reef will be much lower than the initial speed of the speed inlet, which will affect the overall efficiency indicator of the spoiler. From the longitudinal interval of the reef, 5m and 6m behind the reef is a better choice. When the vertical spacing is 6m, the single tail area is the largest volume, and the tail volume efficiency index formed by composite ARs is also the largest, about 2.59. The purpose of this study is to produce a larger upflow efficiency index in the form of composite ARs to facilitate the exchange of upstream and downstream water layers. The vertical span of the rising current generated by the module is approximately 2.5L (Figure 10). Therefore, considering the upflow efficiency index, the influence range and the velocity distribution of the trailing area, the vertical spacing at 5m works best. At this point, the upflow efficiency index reaches its maximum value, at about 24.51. Therefore, when the incoming flow angle is 0 degrees, the horizontal spacing of the composite AR group should be 1 times the width of the reef, and the vertical spacing should be 5/3l to 2L, at which point the upflow and tail flow efficiency indicators are optimal. Similarly, under other incoming angle conditions, the choice of horizontal and vertical spacing between AR sets depends on the range of individual upflow and tail stream regions for optimal spacing.

The choice of the vertical spacing between reefs is related to the range of wake generated by urs. From the wake volume diagram of the module, we can see that the wake length of the reef is about twice the length of the reef. From the velocity contour in the x-axis direction, the coverage area of low velocity or slow flow at 3M and 4m behind the module is much larger than that at 5M and 6m behind the reef. The reefs 3-4 meters behind are located in the core of the wake zone, the wake vortex, and the flow velocity decreases rapidly. If the interval of the combined spoiler is set at this position, the inflow velocity of the rear reef will be much lower than the initial velocity of the velocity inlet, which will affect the overall efficiency index of the spoiler. In terms of the vertical spacing of reefs, 5M and 6m behind reefs are the better choices. When the longitudinal distance is 6 m, the volume of single wake is the largest, and the wake volume efficiency index of compound ARS is also the largest, about 2.59. The purpose of this study is to generate a larger upwelling efficiency index in the form of composite ars, so as to promote the exchange between the upper and lower water layers. The longitudinal span of the upwelling generated by the module is about 2.5L (FIG. 10). Therefore, considering the upwelling efficiency index, the influence range and the velocity distribution in the wake area, the longitudinal spacing at 5m is the best. At this time, the upwelling efficiency index reaches the maximum value, about 24.51. Therefore, when the incident current angle is 0 °, the transverse spacing of the composite ar group should be 1 times of the reef width, and the longitudinal spacing should be 5 / 3L ~ 2L, and the upwelling and wake efficiency indexes are the best. Similarly, under other incident angles, the selection of the transverse and longitudinal spacing between AR sets depends on the range of a single upwelling and wake region, so as to obtain the optimal spacing.<br>