CAJ | 학술논문

为研究水下航行体垂直发射尾空泡生成演化过程，采用Mixture多相流模型、标准k-ε湍流模型和动网格方法求解RANS方程，建立了三维三自由度计算模型，对航行体垂直发射过程进行了数值模拟，计算结果与试验结果吻合较好，获得了尾空泡生成演化的周期性特征。研究了牵连速度和发射水深对尾空泡生成演化的影响，结果表明，牵连速度增大导致拉断后回射流上升斜切尾空泡的角度增大；发射水深增加导致尾空泡压力增大，振荡周期缩短。
위연구수하항행체수직발사미공포생성연화과정，채용Mixture다상류모형、표준k-ε단류모형화동망격방법구해RANS방정，건립료삼유삼자유도계산모형，대항행체수직발사과정진행료수치모의，계산결과여시험결과문합교호，획득료미공포생성연화적주기성특정。연구료견련속도화발사수심대미공포생성연화적영향，결과표명，견련속도증대도치랍단후회사류상승사절미공포적각도증대；발사수심증가도치미공포압력증대，진탕주기축단。
To study the evolution process of tail bubble of underwater vehicle vertical launching, Mixture mod-el, standard k-ε turbulence model and dynamic mesh method were adopted to establish 3DOF model to carry out numerical simulation of the vertical launching process, the calculation results agreed well with experimental results, the cyclical characteristics of the evolution process of tail bubble was acquired. The influences of transport velocity and launch water depth on the tail bubble evolution process were researched, the results show that the bigger transport velocity, the bigger re-entrant jet flow angle after tail bubble fractures;the bigger launch water depth, the bigger pressure magnitude of tail bubble and the shorter pressure oscillation period.