The double-dimpled plate is a common type of heat transfer plate for plate air preheaters.Through a numerical simulation method,a standard periodic cylindrical cross-flow model with similar characteristics to the double-dimpled plate was used to study the effect of the l/d ratio of the cylinder spacing l to the diameter d of the cylindrical flow channel on the resistance performance of the model.The study found that as the l/d ratio gradually increased,its effect on the resistance performance gradually weakened.In particular,when l/d≥5.2,the sensitivity of the pressure loss to the l/d value decreased significantly.Based on this conclusion,a double-dimpled plate with the plate spacing of 3 mm and the corrugation spacing of 75 mm was designed and optimized to meet the performance requirements.
关键词
板式空气预热器/正反包波纹板/阻力性能/数值模拟
Key words
plate air preheater/double-dimpled plate/resistance performance/numerical simulation
维普
万方数据