被动应力状态下非流态化颗粒流通过孔口的流率

NONFLUIDIZED PARTICLE FLOW RATE THROUGH AN ORIFICE UNDER PASSIVE STRESS STATE

讨论了非流态化气固流通过孔口流率的理论模型中主动应力状态及被动应力状态模型参数符号的选取原则,导出被动应力状态下颗粒流通过孔口流率的理论方程.将理论计算结果与大量实验数据比较,归纳出被动应力状态下孔口流率的数值解法与简化积分解法的修正系数经验方程.

The theoretical calculation methods,i. e. , the numerical method and the simplified integral method, for predicting particle flow rate through an orifice have been established by using the theory of nonfluidized gas - particle two phase flow. The active stress state and the passive stress state of the particle flow are discussed. The choice of the signs ±and in the theoretical equations is also proposed. The empirical equations for evaluating the correctness factor,Co,which is used to make correction for the particle flow rate Gp calculated by the numerical method and the simplified integral method under the passive stress state, are also given on the basis of regression analysis for experimental data. The predicted value of particle flow rate is in good agreement with the experimental data.