摘要
以相似理论为基础,利用因次分析方法,建立了聚丙烯酰胺水溶液在内管带有等距环槽的同心环空中流动的准则方程;通过室内模拟实验测得相应参数,由该准则方程,并利用最小二乘法及高斯消去法进行回归分析,得到了聚丙烯酰胺水溶液在内管带有等距环槽的同心环空中流动的压降关联公式,并分析了流量和内管带有等距环槽的同心环空特征几何参数对压降的影响.结果表明:聚丙烯酰胺水溶液在内管带有等距环槽的同心环空中流动时的压降随着流量的增加而增大;在流量相同、同心环空长度l一定的情况下,d/a越大(a为环型槽的间距),产生的压降也越大;当d/a相同的情况下,紊流时曲线的斜率比层流时的斜率大;在流量相同、d/a一定的情况下,同心环空长度l越大,产生的压降也越大;当内管长度l相同的情况下,紊流时曲线的斜率比层流时的斜率大.
s: Based on similarity theory and the method of dimensional analysis, the criterion equation of flow of PAM aqueous solution in concentric annuli with isometric ring slots on the inner cylinder is established. With the corresponding flow parameters measured through laboratory experiments and the criterion equation mentioned above, the correlation formulas of pressure drop of flow of PAM aqueous solution in concentric annuli with isometric ring slots on the inner cylinder are obtained through the regression analysis using least square method and Gaussian elimination. Finally, the influences of flow rate and characteristic geometrical parameters in concentric annuli with isometric ring slots on the inner cylinder on pressure drop are analyzed. The results show that the pressure drop of flow of PAM aqueous solution in concentric annuli with isometric ring slots on the inner cylinder increases with flow rate; the pressure drop increases with the structural parameter d/a under the condition that flow rate and the length l of concentric annuli are uniform; the curve gradient in turbulent flow is larger than that in laminar flow when the structural parameter d/a is uniform. The pressure drop increases with the length l of concentric annuli under the condition that flow rate and structural parameter d/a are uniform; the curve gradient in turbulent flow is larger than that in laminar flow when the length l of concentric annuli is uniform.
出处
《大庆石油学院学报》
CAS
北大核心
2006年第2期38-40,56,共4页
Journal of Daqing Petroleum Institute
关键词
聚丙烯酰胺水溶液
等距环槽
同心环空
压降
准则方程
PAM aqueous solution
isometric ring slots
concentric annuli
pressure drop
criterion equation
