流程阀门启闭过程瞬态气固两相流动特性及磨损研究

Transient erosion is a serious problem appeared in valves which are used for regulating dilute gas-solid flow, and it is caused by the variation of gas-solid flow properties in opening and closing processes. So in order to obtain erosion characteristics of valve in these two processes and to guide design, it is needed to solve following two key science problems firstly: (1) accurate computational simulation of transient gas-solid flow; (2) dynamic motion law of particles. Therefore, based on previous studies, a valve with a translational disc is investigated by theoretical analysis, numerical simulation and experimental tests. A mathematical model for the simulation of transient gas-solid flow in valve during opening and closing processes is firstly established. Then influences of structure parameters and flowing parameters on gas flow and particle motion are discussed, and the dynamic variation rules of gas-solid flow in valve are revealed. Finaly, the effect of varying flow section on solid particle erosion in valve is obtained. This research offers theoretical supports for the serviceability of valves with the working media of gas and solid particles.

内部流道的瞬态磨损是流程阀门在用于稀相气固两相介质调节中存在的重要问题，它主要由启闭过程中阀门内部气固两相流动特性变化所引起。因此为了获得这种含稀固相流程阀门的磨损特性，指导阀门的设计与应用，亟需解决阀门启闭过程中气固两相流动精确数值计算与内部颗粒相的动态运动规律两个关键科学问题。本项目拟在原有工作基础上，以启闭件为平动的阀门为研究对象，通过理论分析、数值模拟和实验研究等方法，确立适合阀门启闭过程的非定常气固两相流动数学模型，分析阀门结构参数和流动参数对气体流场结构和颗粒运动的影响，揭示阀门瞬变过程中气固两相流动动态变化规律，进而获得过流断面变化规律对阀门内部流道的磨损的影响规律，为提高含稀固相流程阀门的可靠运行提供理论支撑。

内部流道的磨损是流程阀门在用于稀相气固两相介质调节中存在的重要问题，它主要由阀门内部气固两相流动特性变化所引起。为了获得这种含稀固相流程阀门的磨损特性，指导阀门的设计与应用，本项目以启闭件为平动的阀门为研究对象，通过理论分析、数值模拟和实验研究等方法，获得了反映过流断面变化的颗粒－气体相间关键作用力，确立了适合阀门启闭过程的非定常气固两相流动数学模型，获得了阀门启闭过程开度变化对流阻特性的影响规律，揭示了开度变化对气相动态流动特性及颗粒相动态运动特性的影响，获得了启闭过程阀门内部流道的磨损特性，为提高含稀固相流程阀门的可靠运行提供了支撑。. 通过研究共发表了SCI检索论文6篇（国际期刊5篇）；授权了发明专利4项；培养了硕士研究生5名，晋升了副高职称1名。