摘要
针对国内某喷水推进游艇进水流道和导叶叶片水动力性能不理想的问题,应用优化设计和计算流体方法对其进行改进。为满足数值计算所需要的船底边界层对进水流道和喷泵的影响,界定喷水推进器流场控制体,联合采用四面体非结构化网格和六面体结构化网格对所有区域进行离散,选择剪切应力输运湍流模型,采用稳态多参考系方法计算求解系统流场。将喷泵、进水流道、格栅和船底组合一起并通过壁面积分法计算在70~90 km/h航速时产生的有效推力。结果表明,导叶叶片和进水流道通过优化设计后,喷水推进器的推力效率提高,产生的推力明显大于原设计。
Aiming at the problem that the hydrodynamics performance of inlet duct and stator blades of one waterjet yacht was not perfect, optimal design and computational fluid dynamics （CFD） are applied. The influence of the hull＇s boundary layer on waterjet propulsion system are taken into account, and a control volume of calculated fluid flow region of waterjet is defined and meshed by hexagonal structured grids and tetrahedral unstructured grids. The CFD code solves the RANS equations with MFR method and shear stress transport turbulent model is chosen. Pump, inlet duct, fence and ship bottom are integrated and simulated to obtain the thrust by an area-integration method at the range of 70-90km/h. It reveals that after being optimized, the thrust efficiency of waterjet is raised and the thrust of waterjet is greater than old one.
出处
《船海工程》
2014年第6期35-39,共5页
Ship & Ocean Engineering
基金
国家自然科学基金(51309229)
