Abstract: The distribution of liquid phase flow field in a self-stirring reactor driven by pressure energy was studied by numerical simulation method. Firstly， the appropriate turbulence model was determined by comparing the simulation results of the standard k-ε model， RNG k-ε model， and realizable k-ε model with the PIV experimental results.Then the influence of inlet pressure and liquid level height on the fluid field distribution in the reactor was studied. The results showed that the standard k-ε turbulence model can accurately simulate fluid field distribution of the reactor， and the stable time is more than 12 s. Increasing inlet pressure and liquid height is favorable to the even distribution of fluid velocity in the reactor， and there is almost no dead zone of velocity when inlet pressure is 3MPa.

Key words: CFD(computational fluid dynamics), velocity distribution, turbulent kinetic energy, self-stirring, tubular reactor