耙吸挖泥船消能箱关键参数对装舱效果影响的数值分析

Numerical analysis of influence of TSHD loading box key parameters on loading effect

消能箱作为泥舱系统的关键设备,直接参与疏浚装舱过程,其出流特性对船舶装舱效果及生产效率有重要影响。以1.50万m 3耙吸挖泥船的消能箱为研究对象,采用流场数值模拟手段,对消能箱主体尺寸、结构形式等影响出流特性的关键参数进行计算分析。结果表明,在一定范围内,消能箱管径越大,消能效果越好,且出流均匀性得到一定程度改善;等截面积条件下,圆形截面消能箱的装舱效果显著优于方形截面的设计;消能箱中部开口指向舱底的速度分量较大,可通过布置水平挡板进行局部优化。该消能箱设计有助于改善疏浚装舱过程中细粉砂的沉积效果,节省装舱时间,减少溢流损失。

As the key equipment of the hopper system,the loading box directly participates in the loading process,and its discharge characteristics have an important impact on the effect of loading and production efficiency of the ship.Taking the loading box of a 15,000 m 3 trailing suction hopper dredger as the research object,the flow field numerical simulation method is used to calculate and analyze the key parameters such as the main body size and structural form of the loading box,which affect the flow characteristics.The results show that within a certain range,the energy dissipation effect is improved as the diameter of the loading box increases,and the discharge uniformity is improved to a certain extent.Under the condition of equal cross-sectional area,the effect of loading with a circular-section loading box is significantly better than that with a square-section one.The downward velocity component at the middle openings of the loading box is much larger,which can be locally optimized by arranging two horizontal baffles.The loading box design proposed in this study can help to improve the deposition effect in the process of dredging and loading fine silt,save loading time and reduce overflow losses.