摘要
为研究不同进流方向对喷水推进器进流性能的影响,该文对一种平进口式喷水推进器流道建立数值模型,采用k-?湍流模型封闭流体流动控制方程,通过求解RANS方程,分别得到了在直航、倒航和斜航等不同船舶航行状态下喷水推进器流道中的黏性流场。结果显示,直航条件下的计算结果与试验数据吻合良好,验证了数值模型和数值方法的有效性。并从流道的壁面压力分布、流场均匀性和流动分离三个方面比较和分析了进流方向对流场特征的影响。结果表明,倒航状态下流道内的流场更不均匀,压力更低,更易发生空化和流动分离现象。研究结果可为喷水推进器进水流道的优化设计提供一定的参考。
To study the effects of inflow directions on the flow field within a flush type of intake duct of waterjet, numerical simulations of the viscous flow under forward, backward and oblique moving conditions are carried out by solving the RANS equations together with the k-ε turbulence model. The computed results under forward conditions are in good agreement with the available experimental data, demonstrating the effectiveness of the adopted numerical method. The effects of inflow directions on the flow characteristics are compared and analyzed in terms of surface pressure distribution, flow uniformity and flow separation. The numerical results show that, under the backward conditions, the flow is less uniform, the pressure is lower, and cavitation and flow separation are more likely to occur within the intake duct. The investigation results can provide some reference for the optimization design of the waterjet intake duct.
作者
许慧丽
邹早建
XU Hui-li;ZOU Zao-jian(School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2018年第2期181-187,共7页
Chinese Journal of Hydrodynamics
基金
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基金项目(61422230301162223010)~~
关键词
喷水推进
进水流道
流场特征
数值模拟
waterjet propulsion
intake duct
flow characteristics
numerical simulation
