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开展微重力动态水气分离器性能研究,对水气分离技术设计与优化具有重要意义。根据动态水气分离器内部结构和流动形式,建立了基于环状流-库特流假设的理论分析模型,提出了基于界面概率近似方法的欧拉双流体模型描述由流动形态转化造成的混合流多尺度界面,采用多参考系方法处理转动与非转动区域之间的变量交互问题。应用理论分析与仿真两种方法研究动态水气分离器准稳态和瞬态特性的无量纲参数变化规律。结果表明:理论分析与仿真结果具有较强的相互验证关系;准稳态的增压比和能耗特性能提供设计参数选择依据,能效比能确定最佳工作区间;分离阶段瞬态特性与入口流动参数无关,输运阶段瞬态特性与入口流动参数、液路出口阻尼相关;以输运压力作为液路出口电磁阀关闭充分条件可实现液分离效率不受入口流动参数影响。
Carrying out the research on the performance of microgravity dynamic water vapor separator is of great significance to the design and optimization of the technology of water vapor separation. According to the internal structure and flow pattern of dynamic gas-liquid separator, a theoretical analysis model based on the assumption of annular flow-Kurt flow is established and the Euler bi-fluid model based on the interface probability approximation method is proposed to describe the mixed flow caused by the flow pattern transformation Multi-scale interface, using multi-reference system to deal with variable interaction between rotating and non-rotating regions. Two methods of theoretical analysis and simulation are used to study the variation of non-dimensional parameters of the quasi-steady state and transient characteristics of a dynamic water vapor separator. The results show that the theoretical analysis and the simulation results have a strong mutual verification relationship. The quasi-steady pressure ratio and energy consumption characteristics can provide the basis for design parameters selection and energy efficiency ratio to determine the best working range. The transient characteristics of the transport phase have nothing to do with the flow parameters. The transient characteristics of the transport phase are related to the inlet flow parameters and the outlet damping of the liquid passage. The transport pressure can be used as the electromagnetic valve close condition of the liquid outlet to ensure that the liquid separation efficiency is not affected by the inlet flow parameters.