导流板安放角对喷水推进器倒车水斗性能影响

为了研究导流板安放角对喷水推进器倒车水斗性能的影响,基于ANSYS-CFX软件对不同导流板安放角(5°,10°,15°,20°,25°和30°)下倒车水斗进行数值计算,对比分析了导流板安放角对倒车水斗推力性能以及流道内流场分布情况的影响,得出了倒车水斗导流板安放角对喷水推进器倒车水斗性能的影响规律.结果表明:相较于无导流板,安装导流板后倒车水斗壁面压力分布得到很大程度改善,出口流速最大值增加.随着导流板安放角的增加,倒车水斗出口流速最大值呈现先增加后减小的趋势,而其流道各截面的压差呈现先增加后减小、然后再增加的变化趋势;导流板安放角为15°左右时,倒车水斗流道内流场分布较好,同时其推力相对较大,此时喷水推进器倒车水斗性能最佳.因此合适的导流板安放角可以有效避免倒车水斗流道内过高压区与过低压区的出现,并致流动分离现象的发生.

Influence of setting angle of deflector on performance of water jet propeller

In order to study the influence of the setting angle of the deflector on the performance of the reversing bucket of the water jet propeller, based on the ANSYS-CFX software, the numerical calculation of the reversing bucket with different setting angles of the deflector(5°,10°,15°,20°,25°and 30° was performed). The influence of the angle of the deflector on the thrust performance of the reverse bucket and the flow field distribution in the flow channel was compared and analyzed. The influence of the angle of the bucket deflector on the performance of the water-jet propeller was obtained. The results show that the wall pressure distribution of the reversing bucket is greatly improved and the maximum outlet velocity is increased when the deflector is installed. With the increase of the deflector angle, the maximum velocity at the outlet of the reversing bucket increases first and then decreases, while the pressure difference of each section of the flow passage increases first, then decreases, and then increases again; when the setting angle is about 15°, the flow field distribution in the flow passage of the reversing bucket is better, and its thrust is larger. Therefore, the proper angle of deflector can effectively avoid the occurrence of over-high pressure area and over-low pressure area in the flow passage of reversing bucket, which leads to flow separation.