CAJ | 학술논문

采用两流体模型以及DES湍流模型对通气超空泡发展过程以及泡内压力变化规律进行了三维数值仿真.模拟了两种泄气方式:回注射流和双涡管泄气方式.并基于文中数值方法预测通气超空泡方面的能力,对两种研究航行体滑行状态的方法进行了评估:一种方法是在水槽中的定轴俯仰运动,另一种方法是类似于约束模实验的自由俯仰运动,两种方法都采用了网格变形技术.结果表明在相同条件下,后者可以很容易得到超空泡航行体的滑行状态而前者较难获取滑行状态,尽管在水槽中前者更易实现.文中的数值方法可以用来进一步研究滑行状态并给出一些有意义的结论.
채용량류체모형이급DES단류모형대통기초공포발전과정이급포내압력변화규률진행료삼유수치방진.모의료량충설기방식:회주사류화쌍와관설기방식.병기우문중수치방법예측통기초공포방면적능력,대량충연구항행체활행상태적방법진행료평고:일충방법시재수조중적정축부앙운동,령일충방법시유사우약속모실험적자유부앙운동,량충방법도채용료망격변형기술.결과표명재상동조건하,후자가이흔용역득도초공포항행체적활행상태이전자교난획취활행상태,진관재수조중전자경역실현.문중적수치방법가이용래진일보연구활행상태병급출일사유의의적결론.
In order to understand the evolution rule of the inner pressure of ventilated supercavity in its developing process as well as the cavity stability,unsteady three dimensional numerical simulations adopting the two-fluid muhiphase flow model and DES(Detached Eddy Simulation Model)turbulence model are carried out.One method based on the relative motion and mesh deformation technology is adopted to investigate the planing state of supercavitating vehicle.The results show the method can predict the developing process of supercavity and its instability characteristic as well aS the planing state of supercavitafing vehicles.The numerical method can be used to further investigate the planing state and give some significant conclusions.