考虑耙吸力的耙吸挖泥船阻力性能数值分析及试验比较

Numerical Analysis and Experiment Comparison of Resistance Performance for the Trailing Suction Hopper Dredger with Drag Force

自航耙吸挖泥船的船体线型较为肥大,作业工况较多,不同工况下对阻力性能的要求不尽相同。利用计算流体动力学(CFD)建立某耙吸挖泥船的数值模型,计算分析耙吸挖泥船裸船体的阻力性能,并将所得结果与模型试验数据相对比。在此基础上,考虑耙吸力的影响,分析不同工况下该耙吸挖泥船在装有不同螺旋桨的情况下,其船体和舵的阻力性能差异,并通过流场分析其作用机理。结合螺旋桨敞水性能,计算新导管桨与原桨在实尺度下的推进效率和收到功率,结果表明,新导管桨的推进效率相较于原桨提升了约8.8%,验证了耙吸挖泥船耙吸力的合理性。

The hull of Trailing Suction Hopper Dredger(TSHD)is relatively large,and its resistance performance is different under various working conditions.CFD technology is firstly used to establish TSHD numerical model and calculate the resistance performance of the bare hull of the TSHD.The results are consistent with the model test data.On the basis,considering the influence of the drag force,the resistance performance difference of the hull and rudder of TSHD with different propellers under working conditions have been calculated,and the mechanism of action is analyzed through the flow field.Combined with the open-water performance of the propeller,the propulsion efficiency and received power of the new ducted propeller and the original propeller have been calculated.The results show that the propulsion efficiency of the new ducted propeller was increased by about 8.8%compared with the original propeller,which verified the trailing suction excavation.The rationality of TSHD is verified.