sc-CO2在GFRP中的渗透模型及其数值模拟

受成型工艺和材料属性的限制，GFRP(Glass Fiber Reinforced Plastics)在表面和内部存在一定数量的孔隙，导致管材输送超临界CO2(sc-CO2)时受到流体渗透和扩散的作用而性能降低.为研究不同工况下介质在GFRP中的渗透行为，本文建立了sc-CO2在GFRP中渗透扩散的多孔介质模型，运用计算机流体力学软件FLUENT模拟了sc-CO2在GFRP中的渗透行为，通过控制粘性阻力系数和惯性阻力，研究了渗透深度随时间变化的规律，以及温度和压强对sc-CO2在GFRP中的渗透速度影响规律.结果表明：不同渗透阻力系数下，sc-CO2在GFRP中的渗透速度相差较大，但其渗透深度的变化趋势基本一致，即渗透速度只有量的差异，没有质的区别；随温度的升高，sc-CO2的渗透速率降低；随压强的升高，sc-CO2渗透速率显著增加.
Due to the limitation of the processing technique and the materials feature, there usually exist numerous pores in Glass Fiber Reinforced Plastics(GFRP), which will reduce the performance in transfer supercritical CO2(sc-CO2). The porous media model has been established to simulate the penetration behaviors of sc-CO2 in different conditions by the software FLUENT. The penetration depth as a function of the time, and the effect of the temperature and pressure on the penetration rate of sc-CO2 in GFRP have been studied by controlling both viscous and inertial resistance coefficient in this work. The result shows that the penetration rate of sc-CO2 varies considerably with coefficientsThe penetration rate decreases with the increase in the temperature and dramatically increases with the increase inthe pressure.