中南大学学报（自然科学版）2018，Vol.49Issue(5)：1289-1296,8.DOI:10.11817/j.issn.1672-7207.2018.05.033
液固两相射流冲击磨损的数值计算与实验研究
Numerical and experimental investigation of erosion by liquid-solid impinging jet
摘要
Abstract
Both experimental and numerical method were applied to investigate the erosion wear behaviour of liquid-solid two-phase jet on stainless steel, the average wear rates of samples under conditions of different mass fractions and particle sizes were analyzed, and the wear rates at different jet velocities were predicted based on the numerical simulation, and finally the relationship model of erosion wear rate with jet velocity was established. The results show that the numerical simulations of single-phase flow field agree well with those of the experiments. The mean velocities of impinging jet have similar trends at various radial distances from the core region. The axial velocity near the wall decreases sharply, which causes the increase of Reynolds shear stress. However, apart from the wall, the normal velocity increases gradually as well as the fluctuation velocity, which causes the increase of Reynolds stress. Apart from the wall sequentially, Reynolds stress decreases gradually to zero. A stagnation region is found right below the impinging jet, where pressure is higher than that in other areas. The downstream scour wear rate first increases and then decreases slightly, while the erosion rate for upstream decreases significantly. The microcosmic test on the surface of the experimental sample verifies the correctness of the erosion rate distribution in different regions.关键词
液固两相/射流/磨损/数值计算Key words
liquid-solid/impinging jet/erosion/numerical simulation分类
能源科技引用本文复制引用
赵彦琳,曾子华,葛少恒,姚军..液固两相射流冲击磨损的数值计算与实验研究[J].中南大学学报（自然科学版）,2018,49(5):1289-1296,8.基金项目
国家自然科学基金资助项目(51776225,51376153,51406235) （51776225,51376153,51406235）
中国石油大学(北京)科学基金资助项目(C201602)(Projects(51776225,51376153,51406235)supported by the National Natural Science Foundation of China （北京）
Project(C201602)supported by the Science Foundation of the China University of Petroleum,Beijing) （C201602）
