贵港船闸灌、泄水非恒定流对通航水流条件影响的数值模拟研究∗

摘要

The second-line ship lock is planned on the right of the first-line ship lock, but the flow pattern in the approach channel is very complex when the double locks are irrigating or draining. Adopting the volume control method, we establish a two-dimensional mathematical numerical model of hydrodynamics to evaluate the navigation condition of the approach channel. The calculation results of various working conditions show that double locks” simultaneous running is the most disadvantageous. In this case, the minimum water depth of the lower approach is enough, however, the flow rate is too large, and there is a certain impact on the safety of the ship. According to the calculation results, the relative displacement of the discharge time can reduce the maximum longitudinal velocity.%拟在贵港航运枢纽右侧增设二线船闸，但双线船闸灌泄水时引航道内非恒定流态水流十分复杂。采用体积控制法建立平面二维水动力数学模型，对贵港引航道内通航条件进行评价。对多个工况进行计算比较，结果表明双线船闸同时运行时最为不利，此时上下游引航道内最小水深均满足要求，但流速过大，对船舶系靠安全有一定影响。由计算结果可知，将泄水时间相对错开，可减小最大纵向流速。