摘要
通过对射流清管过程进行动量和能量平衡分析,建立了等效压降系数计算模型,并利用CFD软件模拟计算了相同运行工况下的等效压降系数,分析验证了等效压降系数与清管器旁通率和气体雷诺数之间的内在关系。研究表明,射流清管器等效压降系数随旁通率的增加呈现微弱减小而后快速增长的趋势,同一旁通率下等效压降系数几乎不随射流气体雷诺数变化而变化;射流清管器结构中的突扩部分对旁通压降的贡献最大,比重接近70%。本文方法计算结果与CFD模拟结果的偏差在6.4%以内,吻合度较高,表明应用本文建立的模型可以较好地计算射流清管器等效压降系数,以此作为射流清管器动态模拟的重要输入参数。本文研究成果对优化射流清管器的设计及对射流清管器模型的修正具有重要的意义。
A computation model for equivalent pressure drop coefficient was developed by analysis on momen-tum and energy balance during bypass pigging process. The CFD simulation for the same process was conduc-ted to analyze and verify the relationships between the equivalent pressure drop coefficient and bypass fraction as well as between the coefficient and Reynolds number of bypass gas. The study shows the coefficient has a tendency of slight decrease then rapid increase with the rise of bypass fraction; and at the same bypass frac-tion, the coefficient hardly changes with the Reynolds number of bypass gas. The sudden expansion structure accounts for the largest portion of the whole pressure drop across the bypass pig, close to 70%. Deviations be-tween the result of computation model developed in this paper and that of CFD simulation are within 6. 4% , which indicates the model can be reasonably used to compute the equivalent pressure drop coefficient of bypass pigs, which is an important parameter input for bypass pig dynamic simulation. The research result is of great significance for the design optimization and prototype modification of bypass pigs.
出处
《中国海上油气》
CAS
CSCD
北大核心
2017年第5期134-140,共7页
China Offshore Oil and Gas
基金
"十三五"国家科技重大专项"深水天然气凝析液控砂与射流清管技术(编号:2016ZX05028-004-003)"部分研究成果
关键词
射流清管器
等效压降系数
计算模型
CFD模拟验证
旁通率
雷诺数
bypass pig
equivalent pressure drop coefficient
computation model
CFD simulation verifica-tion
bypass fraction
Reynolds number
