【摘要】 采用计算流体力学的方法对袋式除尘器脉冲清灰效果进行数值模拟，考察了喷吹压力(p)、喷嘴直径(D)、喷吹距离(S)和脉冲宽度(t_p)对脉冲喷吹性能的影响。基于响应曲面法，建立滤袋壁面平均峰值压力与各因素之间多元回归方程式。研究结果表明，增加脉冲喷吹压力与喷嘴直径有利于脉冲清灰，增加脉冲间隔对脉冲喷吹效果不利，当喷嘴直径为20 mm时，最佳喷吹距离为200 mm。各个因素对脉冲喷吹效果影响为喷嘴直径>喷吹压力>喷吹时间>喷吹距离。建立了二元交互回归预测模型，预测值与模拟值相对误差小于5%,可以更加直观地反映各因素对脉冲喷吹性能的影响，有助于脉冲喷吹系统的优化设计。更多还原

【Abstract】 Computational fluid dynamics was used to simulate the bag filter during pulse-jet cleaning. Effects of pulse-jet pressure(p), nozzle diameter(D), jet distance(S) and pulse duration(t_p) on cleaning efficiency of bag filter were investigated. Based on the response surface method, a multivariate regression equation between the average peak pressure and various factors was established. Results showed that increasing the pulse-jet pressure and nozzle diameter were beneficial to the cleaning efficiency, but increasing the pulse duration was not good for cleaning efficiency. The optimum distance was 200 mm when the diameter of nozzle was 20 mm. The influence order of various factors from high to low on cleaning efficiency was nozzle diameter, pulse-jet pressure, pulse duration and jet distance. A binary interactive regression prediction model was established, and the error between predicted and simulated values was less than 5%, which could more intuitively reflect the influence of various factors on the pulse injection performance, and contribute to the optimal design of the pulse injection system.更多还原