湿润条件下流程阀门气固两相流致磨损研究

Erosion induced by moist gas-solid flow is a common problem happened in process valves which are used for conveying gas and solid particles. The erosion is co-influenced by particles, liquid film, and vortexes inside process valves, and will affect the performance of valves. However, most of present researches are focused on gas-solid flow-induced erosion under dry conditions, rarely under moist conditions. Thus, the effect of moist gas-solid flow parameters on valve erosion needs in-depth study. This project intends to take process valve as the research object. Experimental tests, theoretical analysis, and numerical simulations are used for the investigation. A computational model for the simulation of moist gas-solid flow-induced erosion in valves is firstly established. Then the effects of moist gas-solid flow parameters on internal two-phase flow properties and valve erosion are revealed. Finally, the relationship between internal two-phase flow properties and valve erosion is built. This project would lay the theoretical foundation for erosion prevention and persistent running of process valves.

湿气固两相流致磨损是流程阀门在用于含颗粒介质气体输送中常见的问题，也是影响阀门使用性能的关键问题。它主要受到颗粒、液膜以及阀内涡流等因素的耦合影响。然而目前气固两相流致磨损研究主要侧重于干燥环境，鲜有涉及湿润工况，湿气固两相来流参数对阀门流道磨损的作用机制亟需深入研究。项目拟以流程阀门为研究对象，通过实验研究、理论分析、数值模拟，构建阀门湿气固两相流致磨损计算模型，获得湿气固来流参数对阀门内两相流动的作用规律，揭示湿气固来流参数对流程阀门磨损的影响机制，并进一步建立阀门内湿气固两相流动与流道磨损的相互关联，为降低流程阀门在湿气固两相工况下的磨损破坏和提高连续运行可靠性提供理论支撑。

湿气固两相流致磨损是流程阀门在用于含颗粒介质气体输送中常见的问题，也是影响阀门使用性能的关键问题。项目以流程阀门为研究对象，通过实验研究、理论分析、数值模拟等方法，开展了系列颗粒与壁面碰撞反弹和碰撞磨损实验，构建了颗粒-壁面带液膜碰撞反弹模型，建立了颗粒-壁面带液膜碰撞磨损模型，进而形成了阀门湿气固两相流致磨损计算方法，开展了闸阀、球阀等阀门气固两相和湿气固两相流动及流致磨损的数值模拟，揭示了工况参数对两相流动和磨损的影响规律，并分析了内部流动和流道磨损的关联，为降低流程阀门在湿气固两相工况下的磨损破坏和提高连续运行可靠性提供了理论支撑。