水深对喷水推进器内部流场的影响  

Effect of Water Depth on the Internal Flow Field of Waterjet Propulsion

作　　者：杨茜[1,2] 冯榆坤 陈作钢 张岩[3] YANG Xi;FENG Yukun;CHEN Zuogang;ZHANG Yan(Shanghai Jiao Tong University,State Key Laboratory of Ocean Engineering,Shanghai 200240,China;Shanghai Jiao Tong University,School of Naval Architecture,Ocean and Civil Engineering,Shanghai 200240,China;Science and Technology on Waterjet Propulsion Laboratory,Marine Design and Research Institute of China,Shanghai 200011,China)

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海2200240 [2]上海交通大学船舶海洋与建筑工程学院,上海2200240 [3]中国船舶及海洋工程设计研究院喷水推进技术重点实验室,上海200011

出　　处：《船舶工程》2025年第2期63-72,共10页Ship Engineering

摘　　要：[目的]为探究水深对喷水推进器内部流场的影响,[方法]以WJPLAB-2018型喷水推进泵为例,对其敞水性能进行数值模拟,并将所得结果与试验结果进行对比,验证所采用数值模拟方法的有效性。基于建立的数值模拟方法对不同浅水工况下喷水推进器的水动力特性、进水流道内的流动细节和叶片的压力分布进行分析。[结果]结果表明:随着水深的减小,进水流道内的流动分离现象增强,诱导出的涡旋尺度增大,从而对进流质量产生影响。特别是在极浅水工况下,连续涡旋的存在会显著加剧流道出口流体流动的不均匀性,导致叶片所受压力下降且分布不均,进而影响推进泵的推进效率和内流稳定性。[结论]研究成果可为浅水海域喷水推进船舶的安全航行提供参考。[Purpose]To investigate the influence of water depth on the internal flow field of a waterjet propulsion system,[Method]the effectiveness of the numerical simulation approach is validated by comparing the numerical simulation results with experimental data on the open-water performance of the WJPLAB-2018 waterjet propulsion pump.Based on the established numerical simulation methodology,analyses are conducted regarding the hydrodynamic characteristics of the waterjet propulsion system under different shallow water conditions,as well as the flow details within the inlet duct and the distribution of blade pressures.[Result]The research findings indicate that as the water depth decreases,the phenomenon of flow separation within the inlet duct intensifies,concurrently leading to an enlargement in the scale of induced vortices,thereby influencing the inflow quality.Particularly in extremely shallow water conditions,the presence of continuous vortices significantly exacerbates the non-uniformity at the outlet of the duct,resulting in decreased and unevenly distributed pressures on the blades,thereby affecting the propulsion efficiency and internal flow stability of the pump.[Conclusion]The research findings can provide certain references for the safety of waterjet-propelled vessels navigating in shallow water areas.

关 键 词：喷水推进 水深 非均匀进流 数值模拟 

分 类 号：U664.34[交通运输工程—船舶及航道工程]