洗涤冷却管出口处的射流深度和界面波动特性

Penetration depth and characteristics of interface fluctuation at quenching pipe outlet

采用压差传感器和高清摄像仪对洗涤冷却管出口处射流深度和洗涤冷却室内气液界面波动特性进行了冷模实验研究,研究发现,随着表观气速的增大,射流深度呈指数式增大,由此提出了主流射流深度与洗涤冷却管出口处动量通量的经验式,其最大射流深度可达2.51 cm,同时采用VOF模型和RNGκ-ε湍流模型对其进行了模拟计算,模拟结果与实验结果吻合良好。研究结果还表明,洗涤冷却管出口处液面波动对床层内气液两相环流脉动的影响较为显著。

Gas penetration depth at quenching pipe outlet and fluctuation characteristics of gas-liquid interface of scrubbing-cooling chamber were investigated by a differential pressure transducer and a high definition digital video（HDDV）.The results showed that the penetration depth increased exponentially with increasing superficial gas velocity.On the basis of the experimental data,an empirical equation of main penetration depth and momentum flux of the quenching pipe outlet was proposed and the estimated maximum depth was 2.51 cm.Meanwhile,the VOF model and RNG κ-εturbulence model were used and the simulated results were in good agreement with experimental data.Moreover,the circulating pulsation of the scrubbing-cooling chamber was significantly affected by liquid surface fluctuation of the quenching pipe outlet.