在双组分混合流体的Rayleigh-B啨nard对流系统中,数值模拟获得了周期性时空位错缺陷调谐的扩展行进波对流状态.研究了该状态的时空演化特性.结果表明,Eckhaus不稳定触发的对流涡卷对的产生是调谐的起源,对流涡卷在边界处生成与湮没频率的不同,又使系统返回不稳定区域,系统在稳定与不稳定的波数之间振荡.还探讨了一个周期内传热与混合特性的改变及其控制参数的变化规律. In the Rayleigh-B 啨 nard convection system of two-component mixed fluid, the extended advancing wave convection state of periodic space-time dislocation defect is numerically simulated, and the space-time evolution of the state is studied. The results show that Eckhaus instability trigger The origin of the convection spiral pair is the origin of the tuning. The convection spiral generates and annihilates the different frequencies at the boundary, and returns the system to the unstable region. The system oscillates between stable and unstable wavenumbers. Internal heat transfer and mixing characteristics of the change and control parameters of the law.