环空缩扩和扩缩圆管压降计算方法探讨  

Discussion of Pressure Drop Calculation Method for Annular Contraction-expansion and Expansion-contraction Circular Pipes

作　　者：姚利明[1] 刘巨保[1] 李星月[1] 张晓川[2] 刘玉喜[3] 杨明 JIANG Ming-hu;XING Lei;ZHANG Yong;CAO Zhi-hong(School of Mechanical Science and Engineering,Northeast Petroleum University;Heilongjiang Key Laboratory of Petroleum and Petrochemical Multiphase Treatment and Pollution Prevention)

机构地区：[1]东北石油大学机械科学与工程学院 [2]大庆油田有限责任公司采油工程研究院 [3]大庆油田井下作业分公司工程地质技术大队

出　　处：《化工机械》2018年第3期375-380,共6页Chemical Engineering & Machinery

基　　金：国家自然科学基金项目(11502051);东北石油大学研究生创新科研项目(YJSCX2015-023NEPU)

摘　　要：通过成熟的缩径和扩径圆管压降公式,验证了数值方法准确性,建立了环空缩扩和扩缩圆管数值模型,研究了压力损失规律。结果发现:仅当环空缩扩圆管和扩缩圆管的变径长大于1.3D_e和5.0D_e时,利用环空缩径和环空扩径压降累加求和的方法可以准确计算环空缩扩圆管或扩缩圆管压降。最终,通过对环空缩扩和扩缩圆管数值计算,回归出了适用于变径长小于1.3D_e和5.0D_e的环空缩扩和扩缩圆管压降计算公式。Basing on the mature pressure drop calculation method for contraction and expansion circular pipes,the accuracy of numerical method was verified and the numerical model of annular contraction-expansion circular pipe and that of expansion-contraction tube were established to discuss the rule of pressure loss.The results show that,when the variable diameter length of annular contraction-expansion and expansion-contraction circular pipe is larger than 1. 3 De or 5. 0 De,the cumulative sum formula of pressure drop for annular contraction and expansion circular pipe is applicable. By numerical simulation,a method for calculating the pressure drop of annular contraction-expansion and expansion-contraction circular pipe with the variable diameter length of less than 1. 3 De and 5. 0 De is regressed.

关 键 词：环空管道 缩扩圆管 扩缩圆管 压降公式 数值仿真 

分 类 号：TQ055.81[化学工程]