摘要
使用拓扑结构分析方法对某型压气机静叶栅的直叶片与弯叶片数值计算,对壁面分离流结构进行了分析研究,发现弯叶片对壁面流线拓扑结构和分离流结构影响明显。给出了直叶栅吸力面/下端壁角区流场的拓扑结构,并证明数值计算结果的奇点总数满足环形叶栅壁面(包括叶片表面和上、下端壁表面)拓扑准则。
The separated flow structure on and near the surface of straight and bowed stationary blades of a certain type of compression cascade has been studied in detail by using the topological analyzing method and numerical calculation. It was discovered that bowed blades have on obvious influence on the topological structure of streamlines, at wall surfaces as well as on the structure of the separated flows. The topological structure of the flow field at the suction surface and the lower end-wall corner of a straight blade cascade are shown, together with a proof that the total number of singular points obtained by numerical calculation meets the topological criterion for the surfaces of annular cascades（ including blade＇s surface as well as tip and hub end-wasll＇s surfaces）. Figs 10 and refs 4.
出处
《动力工程》
EI
CSCD
北大核心
2006年第4期486-490,共5页
Power Engineering
基金
国家自然科学基金重点项目(50236020)
关键词
动力机械工程
压气机
分离流
拓扑结构
静叶
弯叶片
低速
power and mechanical engineering
compressor
separated flow
topological structure
static blade
bowed blade
low velocity
