关键词: 输送顺序 , 倾角 , 停输 , 混油特性 , 数值模拟

Abstract: In regions of complex terrain, refined oil will inevitably pass after elevation, shutdown, such as downhill different path. The pipe inclination angle and shutdown time of downhill pipeline blending have a great influence on mixed oil characteristics. Using CFD multiphase flow model and studying three-dimensional inclined pipe, on the shutdown time, angle and sequence transportation on mixed oil characteristics were numerically simulated respectively. The results of the study show that before shutdown while the forward gasoline and backward diesel, the dip angle is bigger, the mixed oil quantity is less; the inclination angle is smaller, it is more prone to mixed oil. When the forward diesel and backward gas ,contaminated tail is longer and the inclination angle is bigger, the mixed oil quantity is bigger while the inclination angle is smaller, the mixed oil quantity is less but there is less effect on the mixed oil. The inclination angle has greater influence on the former than the latter.After shutdown, the longer the time of shutdown is, the more the mixed oil is with the equal angle. With the same time, the bigger the angle is, the greater the mixed oil. While the forward diesel and backward gasoline, with the shutdown time prolonging the mixed oil quantity is more and more uniform. When the inclination angle and the angle of pipeline is the same, shutdown time and angle has greater influence on the condition of the forward gasoline and the backward diesel.

Key words: Transportation sequence , Dip angle ,  Shutdown , Oil characteristics ,  Numerical simulation