洗涤冷却管出口处气液界面波动特性实验及模拟  

Experimental and Numerical Investigation of Gas-Liquid Interfacial Fluctuation in Scrubbing-Cooling Pipe Outlet

作　　者：赵晓辉[1] 王亦飞[1] 尹柯[1] 柴雪琴[1] 

机构地区：[1]华东理工大学煤气化教育部重点实验室,上海200237

出　　处：《华东理工大学学报（自然科学版）》2010年第3期340-345,共6页Journal of East China University of Science and Technology

基　　金：国家重点基础研究发展计划(973计划)(2004CB217700);教育部"长江学者与创新团队发展计划"(PCSIRT-IRT0620)

摘　　要：对新型洗涤冷却室洗涤冷却管出口处流体的射流深度进行了实验研究,得到了射流深度随弗鲁德数变化的拟合式。借助Fluent商业软件建立了该过程的数学模型,模型计算值与实验值吻合较好。利用所建模型得到了出口处射流深度随时间变化的数据,用其表征气液界面波动,并用压力信号波动来表征床层内的环流脉动,对两者进行频谱分析。结果表明两者主频一致,出口处液面波动是引起床层内气液两相周期性环流脉动的主要诱导因素。为了减少床层内环流脉动所引起的一系列工程问题,必须改善洗涤冷却管出口气体的分配特性。The penetration depth of the scrubbing-cooling pipe in new type of scrubbing-cooling chamber was investigated experimentally and numerically.The results of the experiment and numerical model were in good agreement,which indicated the reliability of the model.Based on this numerical model,the penetration depth in scrubbing-cooling pipe outlet was investigated.The results were used to characterize interfacial fluctuation and pressure fluctuation signals characterizing circumfluence fluctuation.Both of them were analyzed in FFT method and main frequenies were got.It was found that the two main frequenies were consistent.Therefore,the fluctuation of the gas-liquid interface was the major inducing factor that drove the circumfluence fluctuation in the chamber.In order to avoid the industry problems aroused by circumfluence fluctuation,some measures must be taken to improve the character of gas distribution in scrubbing-cooling pipe outlet.

关 键 词：洗涤冷却管 射流深度 气液界面波动 环流脉动 数值模拟 

分 类 号：TQ54[化学工程—煤化学工程]