基于流场结构协同度指标的涡流管模型构建与多参数协调优化策略

涡流管具有结构简单、工质绿色环保、性能安全可靠等诸多优点，在众多领域具有极大发展潜力和广阔的应用前景。然而，缺乏完善的性能预测理论和优化方法是目前高性能涡流管开发所面临的瓶颈与难点。本项目拟从深度挖掘不同参数与流场结构的直接映射关系，构建“流场结构协同度”指标，将多元的、模糊的分析结果转化为明确、统一的分析指标。结合新型动态分区模型，改进参数作用项形式，建立完善数学模型，预测涡流管能量分离性能，阐明能量分离机制。基于此，提出涡流管性能的多参数协调优化准则，采用多目标遗传优化算法和参数化建模方法指导构筑高效涡流管。同时，借助五孔探针和热电偶的接触式测量方法，激光多普勒测速（LDV）可视化试验方法以及CFD数值模拟揭示涡流管内流动和分离规律并对理论进行验证。本研究可解决涡流管能量分离效率较低的关键技术问题,为对涡流管流场的认知提供新的方法和开辟新的途径，对提高涡流管性能提供科学指导和理论依据。

The vortex tube has many advantages such as simple structure, using green working fluids, safe and reliable performance, etc., thus has great development potential and broad application prospects in many fields. However, the lack of an integral performance prediction theory and optimization method are the bottlenecks and difficulties faced by high-performance vortex tube development. This project intends to dig out the direct mapping relationship between different parameters and the flow field structure from the depth to construct the "flow field structure synergy" index, and transform the multiple and fuzzy analysis parameters into clear and unified analysis indicators. Combined with the new dynamic partitioning model, the parameters’ action term forms will be improved, a mathematical model will be established to predict the energy separation performance of the vortex tube, and to clarify the energy separation mechanism. A multi-parameter coordinated optimization criterion for vortex tube performance will be proposed, and multi-objective genetic optimization algorithm and parametric modeling method will be used to guide the efficient improvement of the vortex tube. At the same time, with the help of a five-hole probe and thermocouple contact measurement method, a laser Doppler velocimetry (LDV) visualization test method, combined with CFD numerical simulation, the flow and separation rules in the vortex tube will be revealed and the theory will be verified. This research will solve the key technical problems of low energy separation efficiency of vortex tubes, provide new methods and open new ways for understanding the flow field of vortex tubes, and provide scientific guidance and theoretical basis for improving the performance of vortex tubes.