压裂工况下T型三通冲蚀影响数值模拟

研究水力压裂工况下T型三通的冲蚀。基于FLUENT内置的DPM模型探究流速、质量流量、粒子直径、进出口流通方式对T型三通冲蚀的影响。结果表明：内部流速与冲蚀率的变化关系呈现幂函数关系,且曲线中存在冲蚀影响临界流速。液体流速小于临界流速,流速的增加引起冲蚀程度增加较不明显,当流速超过临界流速,引起冲蚀率的急剧增加。支撑剂颗粒粒径与冲蚀率的变化关系呈正相关。汇流状态下的冲蚀率最大,分流状态下的冲蚀率最小。汇流状态下的冲蚀率最大是分流状态下的30.7倍；既不分流也不汇流状态下的最大冲蚀率可以达到了分流状态的冲蚀率的5.4倍。

Numerical simulation of erosion effect of t-type tee under Fracturing Condition

The erosion behavior to T-type tee under fracturing condition was studied through the DPM model built in FLUENT, the erosion of T-type tee is influenced by flow velocity, mass flow rate, particle diameter, inlet and outlet circulation mode. The relationship between internal velocity and erosion rate shows a power function and erosion affects critical velocity in the curve. The increase of the flow rate causes less obvious increase of erosion degree when the liquid flow rate is less than the critical flow rate, and the erosion rate increases sharply when the flow rate exceeds the critical flow rate. There is a positive correlation between the particle size of proppant particles and the erosion rate. The erosion rate is the largest in the confluent state and the smallest in the distributary state. The erosion rate in confluent state is 30.7 times higher than that in diversion state. The maximum erosion rate, which is under the condition of neither diversion nor confluence, can reach 5.4 times of the erosion rate under the condition of diversion.