基于PumpLinx的油气分离器数值模拟

Numerical Simulation of Oil and Gas Separator Based on PumpLinx

摘要: 针对螺杆压缩机的油气分离器，应用PumpLinx软件对不同入口方式、不同油滴直径以及不同容积流量的分离器进行了三维数值模拟。在仿真中，气–液两相流场符合流体N-S方程，先用RNG k-ε模型计算连续相的压缩气体，得到分离器内部旋转流场的流线、速度、压力的分布规律，再用离散相模型计算加入离散相的液态油滴，得到了油滴的运动轨迹追踪图。通过对两相流场模拟结果的对比分析，PumpLinx软件可以较好地模拟入口方向、容积流量对流场分布规律的影响以及油滴直径对分离效率的影响，为油气分离器的优化设计提供了一种有效的研究手段，具有重要的工程应用价值。

Abstract: For the oil and gas separator of screw compressor, three-dimensional numerical simulation of se-parators with different inlet modes, different oil droplet diameters and different volumetric flows was carried out by using PumpLinx software. In the simulation, the gas-liquid two-phase flow conforms to the fluid N-S equation. Firstly, the RNG k-ε model is used to calculate the compressed gas in continuous phase, and the distributions of streamline, velocity and pressure in the rotating flow field inside the separator are obtained. The discrete phase model is used to calculate the liquid droplet with discrete phase, and the trace diagram of oil droplet motion is obtained. By comparing and analyzing the simulation results of two phase flow field, PumpLinx software can well simulate the influence of inlet direction, volume flow on the flow field distribution and the influence of oil drop diameter on separation efficiency. It provides an effective research method for the optimization design of oil-gas separator and has important engineering application value.