摘要
在对双级跨音速燃气透平三元黏性湍流场进行数值模拟的基础上,采用颗粒随机轨道模型和气固双向耦合的PSIC法求解了10万个颗粒直径分布为5～50μm (体积分数为4.19×10-5 %)的运动轨迹,以冲蚀率统计模型分析了叶片冲蚀率分布、冲蚀率数值及影响因素等,计算结果比较符合叶片的实际冲蚀情况.
The PSIC approach incorporating with turbulent dispersion of particles is adopted in which 100000 (5~50 mm, volume fraction is 4.19×10-5 %) particle trajectories are traced using Lagrangian theory concerning the interfacial momentum interaction in full 3D viscous gas field in a two-stage transonic gas turbine. The erosion-rate, erosion frequency as well as their distribution in blade-row are determined using the presented model and the effects on erosion are analyzed. The results agree fairly well with the practical blade erosion under operating conditions.
出处
《上海理工大学学报》
CAS
北大核心
2002年第4期319-322,327,共5页
Journal of University of Shanghai For Science and Technology
基金
上海市教委科技发展基金资助项目(2000E12)
关键词
燃气透平
气固双向耦合
颗粒湍流扩散
叶片冲蚀
数值模拟
gas turbine
gas-solid two-way coupling
particle turbulent dispersion
blade erosion
numerical simulation
