严重段塞流现象与立管顶部节流的瞬态模拟  

Transient Simulation of Severe Slugging and Riser Topside Choking

作　　者：李文升[1] 郭烈锦[1] 李乃良[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《工程热物理学报》2014年第1期104-108,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金委创新群体基金项目(No.50821064);优秀重点实验室奖励基金项目(No.50823002)

摘　　要：在对严重段塞流现象实验研究的基础上,本文采用OLGA软件建立了实验系统的瞬态模型,对水平段长度为114 m,下倾段长度为133 m,立管高度为15.3 m,内径为50.8 mm的集输-立管系统中的严重段塞流现象进行了数值研究,给出了相应流型图,并将立管底部压力、立管顶部持液率、段塞周期等严重段塞流特性参数的模拟结果与实验结果进行了对比;本文还对控制严重段塞流现象的立管顶部节流法进行了模拟研究,并与实验结果进行了对比。研究发现,本文的瞬态模型能够较好地模拟出实验中发现的四类流型,但对严重段塞流详细特性参数的模拟不够准确,对顶部节流的模拟与实验结果相差较大,对顶部节流法消除严重段塞流的机理仍需进一步研究。A transient model was developed using OLGA to study the dynamic behavior of sever slugging in a pipeline-riser system. The simulated test loop, with 50.8 mm ID, has a 114 m long horizontal loop connected to a 19 m long pipe which is inclined to 2 degree from horizontal, followed by a 15.3 m high vertical riser. The flow pattern map obtained numerically was tested against previous experimental results, as well as the detailed characteristics of severe slugging such as, pressure at the riser base, liquid holdup at the riser topside, slug frequency, etc. Topside choking, as a common slug control method, was also simulated using present model and compared with the experimental results. The results showed that the four flow patterns observed in experiments could be reproduced well in the simulation. However, the detailed characteristics of severe slugging cannot be predicted accurately by the code, and there are still large discrepancies between the experimental results and simulation in the process of topside choking. It is recommended that further research should be done on the mechanism of topside choking.

关 键 词：严重段塞流 集输-立管系统 瞬态模拟 顶部节流 

分 类 号：O359[理学—流体力学]