高压冲水喷嘴破土性能试验研究

高压冲水喷嘴的破土性能对耙吸挖泥船的疏浚效率有着重要的影响。通过试验对高压冲水喷嘴的破土性能进行研究。结果显示:随着靶距的增加,高压冲水喷嘴的破土深度逐渐减小,破土宽度逐渐增大;随着喷嘴出口压力的增大,破土深度逐渐增加,破土宽度逐渐减小;随着航速的增加,破土深度和破土宽度均逐渐减小;对比有耐磨块和无耐磨块时高压冲水喷嘴的破土性能,两者破土特性的整体变化趋势基本一致——在喷嘴离泥面相同距离时,有耐磨块高压冲水的破土深度和破土宽度均比无耐磨块时要大,且破土宽度的对比量更为明显。

Experimental study on ground-breaking performance of high-pressure flushing nozzle

The ground-breaking performance of the high-pressure flushing nozzle has a significant influence on the dredging efficiency of the trailing suction dredger.The ground-breaking performance of the high-pressure flushing nozzle is studied based on the experiment test.The results show that with the increase of the target distance,the ground-breaking depth of the high-pressure flushing nozzle gradually decreases and the ground-breaking width gradually increases;with the increase of the nozzle outlet pressure,the ground-breaking depth gradually increases and the ground-breaking width gradually decreases;with the increase of headway,the ground-breaking depth and width gradually decrease.Comparied with the ground-breaking performance of the high-pressure flushing nozzle with and without wear blocks,the overall change trend of the ground-breaking characteristics of the two nozzles is basically the same.When the nozzle is at the same distance from the mud surface,the ground-breaking depth and width of wear block high-pressure flushing are both larger than those without wear block,and the comparison of ground-breaking width is more obvious.