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开展微重力膜式水气分离性能仿真研究,对水气分离技术设计与优化具有重要意义。针对微重力入口边界气液界面多尺度问题(入口流型问题)提出了基于界面概率近似方法的欧拉双流体模型,采用动量源项法解决几何多尺度问题(分离膜边界问题),为仿真研究提供了有效的入口及渗透边界。研究了典型工作参数下流道弯曲度对膜分离性能的影响,并从流动形态和作用力贡献2个方面分析了影响机理。结果表明:膜分离性能随流道弯曲度增大而降低,影响程度与入口含气率相关;直流道适于选作膜式静态水气分离器主要流道形式。
Carrying out the simulation study on the performance of the microgravity membrane moisture separation is of great significance to the design and optimization of the moisture separation technology. Aiming at the multi-scale gas-liquid interface problem at the inlet of microgravity (inlet flow model), an Euler bi-fluid model based on the interface probabilistic approximation method is proposed. The momentum multi-scale problem (separation membrane boundary) Research provides an effective entrance and penetration boundary. The influence of the degree of curvature of the runner on the membrane separation performance under typical operating parameters was investigated. The influencing mechanism was analyzed from two aspects of the flow pattern and contribution of force. The results show that the membrane separation performance decreases with the increase of the curvature of the flow channel, and the degree of influence is related to the gas content in the inlet. The direct flow channel is suitable for the main flow channel of the membrane type static gas-liquid separator.