CAJ | 학술논문

附加质量是水下航行器水动力特性中的重要参数.对于弹性体和带空泡状态下的附加质量计算还有一定的困难.采用基于动网格技术的三维非定常粘性CFD程序解决了物体在流场中刚体运动和弹性变形所引起的附加质量计算问题.通过经典的刚体、弹性体附加质量算例验证了此方法是准确可靠的,还结合多相流模型和Bayleigh Plesset空化模型对带空泡体的附加质量进行了数值计算.带空泡体附加质量的数值研究表明,尾流中的空泡是否附体对轴向(流向)的附加质量影响比较大,对于本算例而言前端的肩空泡尺寸与横向(法向)附加质量系数则存在紧密的物理关联.
부가질량시수하항행기수동력특성중적중요삼수.대우탄성체화대공포상태하적부가질량계산환유일정적곤난.채용기우동망격기술적삼유비정상점성CFD정서해결료물체재류장중강체운동화탄성변형소인기적부가질량계산문제.통과경전적강체、탄성체부가질량산례험증료차방법시준학가고적,환결합다상류모형화Bayleigh Plesset공화모형대대공포체적부가질량진행료수치계산.대공포체부가질량적수치연구표명,미류중적공포시부부체대축향(류향)적부가질량영향비교대,대우본산례이언전단적견공포척촌여횡향(법향)부가질량계수칙존재긴밀적물리관련.
Added mass is one of the most important factors of hydrodynamic character,and asking for further study of the effect of flutter and cavity on the added mass.The 3-D unsteady viscous CFD code based on dynamic mesh technique is adopted to solve the problem of added mass computation when objects move rigidly or deform elastieally in fluid.The precision and reliubility of the method is verified through computation of the typical cases of rigid and elastic added mass,and the cavity flow added mass is studied numerically with the method combining with a multiphase model and Rayleigh Plesset cavitation model.The study on cavity flow added mass indicates that,the attaching of the cavitation bubble in the wake flow has a relatively large impact on the axial (streamwise) added mass,and for this example a close physical association exists between the front cavitation bubble length and the transverse added mass.