变系数二阶流体在偏心环空中非定常流压力梯度的数值计算  

Numerical calculation of pressure gradient of unsteady flow of the second-order fluid with variable coefficients in eccentric annulus

作　　者：崔海清[1] 李楠[2] 杨立国[1,3] 宋兴良[1] 

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]中石油大庆油田公司采油工程研究院,黑龙江大庆163453 [3]中石油吉林油田公司,吉林松原138000

出　　处：《中国石油大学学报（自然科学版）》2011年第1期61-64,共4页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(50674019);黑龙江省自然科学基金项目(A200501)

摘　　要：建立给定流量条件下变系数二阶流体在内管做轴向往复运动的偏心环空中非定常流的瞬时压力梯度方程,给出这种流动的时均压力梯度公式及相应的数值计算方法;以HPAM水溶液为例,对其在内管做轴向往复运动的偏心环空中非定常流的时均压力梯度进行数值计算和室内试验。结果表明:环空偏心度对时均压力梯度有明显影响,内管冲程和冲次对时均压力梯度的影响不明显;试验验证了时均压力梯度公式及相应数值计算方法的正确性。An equation of instantaneous pressure gradient for the unsteady flow of the second-order fluid with variable coefficients in eccentric annulus with the inner cylinder reciprocating axially under the precondition of a known flow rate was established.And a formula of time average pressure gradient and correspondent numerical method were presented.Using the HPAM aqueous solution,the time average pressure gradients of the unsteady flow of the fluid in eccentric annulus with the inner cylinder reciprocating axially were numerically calculated,and the correspondent experiments were carried out.The results show that the influence of the annulus eccentricity on the time average pressure gradient is obvious,while the influences of the stroke and the stroke-frequency of the inner cylinder on the time average pressure gradient are not obvious.The correctness of the formula of time average pressure gradient and the correspondent numerical method was tested and verified through experimental results.

关 键 词：变系数二阶流体 偏心环空 轴向往复运动 非定常流 压力梯度 

分 类 号：TE355.5[石油与天然气工程—油气田开发工程]