CAJ | 학술논문

介绍了计算流体力学(CFD)作为一种先进手段在喷水推进器水力性能分析、结构优化设计和推进性能检验中的重要应用.界定了喷水推进器数值计算域,采用结构化网格进行空间离散,选择剪切应力输运湍流模型进行数值计算.在进行了网格无关性分析的基础上,计算了某新型喷水推进泵的外特性,并采用多种定性和定量指标对导叶的整流效果和进水流道的引流性能进行评估,并进行了合理的优化改进.在各部件性能优良的基础上,对“船+泵”流场进行整体计算,通过壁面积分法求取喷水推进器产生的有效推力进行船舶快速性预报. CFD技术的应用为喷水推进器最终设计成功提供了有力保障.
개소료계산류체역학(CFD)작위일충선진수단재분수추진기수력성능분석、결구우화설계화추진성능검험중적중요응용.계정료분수추진기수치계산역,채용결구화망격진행공간리산,선택전절응력수운단류모형진행수치계산.재진행료망격무관성분석적기출상,계산료모신형분수추진빙적외특성,병채용다충정성화정량지표대도협적정류효과화진수류도적인류성능진행평고,병진행료합리적우화개진.재각부건성능우량적기출상,대“선+빙”류장진행정체계산,통과벽면적분법구취분수추진기산생적유효추력진행선박쾌속성예보. CFD기술적응용위분수추진기최종설계성공제공료유력보장.
The important application of computational fluid dynamics (CFD) for marine waterjet performance analysis, optimal design and propulsion characteristic prediction was introducted. The solution domain of waterjet was defined and meshed by hexagonal structured grids. Turbulence effects were taken into account by using shear stress transport turbulent model. This model was applied to a newly designed waterjet pump on base of grid density independence examined. Several qualitative indexes and quantitative ones were adopted to evaluate the diffuser’s rectifying performance and the intake duct’s flow-delivering characters. Some reasonable suggestions for optimal design were provided. The flow field of hull and waterjet was sim-ulated on the base of every component had a good work. Area-integration method was employed to deduce the thrust character, which could make certain the ship speed and guarantee a successful outcome.