内置螺旋转子管式光生物反应器的流动特性数值模拟

提出了在管式光生物反应器（T-PBR）内置螺旋转子以优化其性能的方法。采用两相流模型模拟其流动特性，对内置两叶片螺旋转子、内置低流阻螺旋转子与无内置螺旋转子在旋流数、液相体积传质系数、截面速度云图、液体速度分量及气体速度分量等方面进行模拟比较。结果表明，内置螺旋转子可以增强管内旋流流动，提升气液两相间的传质效率，改善T-PBR的混合性能。最后比较了不同导程两叶片螺旋转子对T-PBR混合-传质性能的影响。

Numerical simulation of hydrodynamic characteristics in tubular photobioreactors with inserted helical rotors

A new type of tubular photobioreactor with inserted helical rotors has been designed. The hydrodynamic characteristics of tubular photobioreactors without helical rotors, with helical two blade rotors and helical low resistance rotors have been compared. The influence of inserted helical rotors on the swirl number, volumetric mass transfer coefficient, velocity contours, liquid velocity components and gas velocity components were examined by using a two-phase model. It was shown that with inserted helical rotors, the mixing of fluid could be intensified, the swirling could be increased and mass transfer could also be enhanced, which is of benefit for the growth of microalgae. Also, the mixing and mass transfer in tubular photobioreactors with different helical pitch rotors were studied and compared.