摘要
对导弹垂直发射系统(VLS,Vertical launching system)内的三维湍流流场进行了数值模拟.采用了单元中心有限体积法和三阶迎风TVD差分格式离散Navier-Stokes方程,采用双时间步和预处理过程提高计算收敛速度,引入对角化的双时间ADI算法求解控制方程.仿真结果准确地模拟了发射系统内的激波形成过程,真实地反映出VLS中的复杂流动.研究表明,压力室底部射流中心的波后压强以大约1 200Hz的频率振荡.
The three-dimensional turbulent flow fields of missile Vertical launching system（VLS） are computed.Cell-centered finite-volume method and 3rd-order upwind spatial differencing with TVD option is applied for Navier-Stokes governing equations.Dual-time stepping and preconditioning procedure are utilized for improving the calculating convergence velocity. The diagonalized,dual-time ADI algorithm is employed to integrate the governing equations.Shock forming in the plenum chamber is simulated accurately.The complex flow pattern in Vertical Launching System was described veritably.The current studies show that the pressure of jet center at the bottom of plenum chamber oscillates with a frequency about 1200Hz.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2007年第10期1765-1770,共6页
Journal of Aerospace Power
关键词
航空、航天推进系统
VLS
导弹
射流
激波
双时间步格式
预处理
aerospace propulsion system
VLS
missile
jet flow
shock wave
dual-time stepping scheme
preconditioning
