该文基于气固两相流动模型计算循环流化床内的流动.颗粒动理学方法模拟颗粒相湍动.采用γ-射线密度计和非等速取样管测量局部颗粒浓度和流率,利用FFT方法计算颗粒浓度功率谱密度.模拟计算得到上升管内气相和固相速度和浓度分布等.数值模拟计算与实验结果相吻合.“,”A multi-dimensional two phase model was used to compute gas solid flow in a CFB. The conservation equations for both solid and gas were solved directly. The constitutive relations for solid phase were derived from kinetic theory of granular flow. Local solid concentration and solid flux were measured by means of a γ-ray densitometer and non-isokinetic extraction probe, respectively. Power spectrum density of solid concentration was calculated using FFT method. The model predicts the most important aspects of a riser, including phase velocities and concentration distribution throughout a riser. The simulations show agreement well with experimental results.