陈一鸣,陈微,刘宏达,何金宝
CHEN Yiming,CHEN Wei,LIU Hongda,HE Jinbao

• 1:辽宁石油化工大学石油天然气工程学院
• 2:辽宁石油化工大学石油化工学院
• 3:辽河油田钻采工艺研究院

摘要(Abstract)：

为研究不同因素对方形补偿器内固体颗粒冲蚀作用规律的影响，基于DPM模型，结合流固耦合稳态模拟及控制变量的方法，对热补偿能力相同的四种标准方形补偿器内壁面的冲蚀速率进行计算。结果表明，4种补偿器内的冲蚀速率随固体颗粒质量流率的增加而增大，其中，Ⅲ型补偿器C弯管局部冲蚀集中区最大占比达到96.2%，Ⅰ型补偿器冲蚀速率与质量流率近似呈线性正相关；在不同粒径范围内，4种补偿器先后出现波动的冲蚀速率变化周期，各型补偿器最大冲蚀速率差距明显。其中，Ⅳ型补偿器内的冲蚀速率可达到1×10~(-7) kg/(m~2·s)量级，明显高于其它3类补偿器；在热补偿量一定的情况下，弯径比为1.5的Ⅳ型补偿器最大冲蚀速率达到弯径比为2.75的Ⅰ型补偿器的6倍，随弯径比的增加，各型补偿器的冲蚀区域均出现明显的扩大。其中，Ⅳ型补偿器在外弧面区出现最大范围0°～240°的“带状”磨蚀区域，最大冲蚀速率逐渐下降并在弯径比为1.5时达到最低值。因此，应根据流体介质中固体颗粒粒径、质量流率及补偿器结构合理选择补偿器类型，从而减轻管件局部点蚀与大范围磨蚀对管道内表面电化学腐蚀保护膜的破坏，以降低冲刷腐蚀速率。
In order to study how different factors affect the erosion of solid particles on the square compensator，based on the DPM model and in combination with the method of fluid-structure coupling steady-state simulation and control variables，the erosion rates of the inner walls of the four standard square compensators with the same thermal compensation ability were calculated.The results show that the erosion rate in the four compensators increases with the increase of the mass flow rate of solid particles.Among them，the local erosion concentrated area of C-bend pipe of typeⅢ compensator accounts for the largest proportion，which is 96.2%.The erosion rate of the type Ⅰ compensator is approximately linear and positively related to the mass flow rate.In different particle size ranges，the four compensators have successively fluctuating erosion rate change cycles，and the maximum erosion rate of each type of compensator has a significant difference.Among them，the erosion rate in the type IV compensator can reach the order of 1×10~(-7) kg/(m~2·s)，which is significantly higher than the other three types of compensator.Under the condition of a given amount of thermal compensation，the maximum erosion rate of type IV compensator with a bending diameter ratio of 1.5 reaches 6 times that of type I compensator with a bending diameter ratio of 2.75.With the increase of the bending diameter ratio，the erosion area of each type of compensator has been significantly enlarged.Among them，type IV compensator has a“band-like”abrasion area with a maximum range of 0°～240° in the outer arc area，the maximum erosion rate decreased gradually and reached its lowest value at a bend-to-diameter ratio of 4，the compensator type should be reasonably selected according to the sizes of solid particles in the fluid medium，mass flow rate and compensator structure so as to reduce the damage of the electrochemical corrosion protection film on the inner surface of the pipe by local pitting and large-scale abrasion of the pipe fittings，and reduce the erosion corrosion rate.

关键词(KeyWords)： 方形补偿器;流固耦合;冲刷腐蚀;冲蚀速率;DPM模型
square compensator;fluid-solid coupling;erosion corrosion;erosion rate;DPM model

Abstract:

Keywords:

基金项目(Foundation): 辽宁省教育厅科学研究经费项目(L2020025)

作者(Author): 陈一鸣,陈微,刘宏达,何金宝
CHEN Yiming,CHEN Wei,LIU Hongda,HE Jinbao

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