环形压气机叶栅内部分离流结构分析 第一部分:近壁区分离流

• 来源期刊: 工程热物理学报
• 学科: 物理学
• 关键词: 环形压气机叶栅 分离流 油膜图像
• 年，卷（期）: 1999,（4）
• 页码范围: 436-439
• 页数: 4页
• 分类号: O354
• 语种: 中文

摘要

The structures of flow and vortices, especiallyt separated flow, on and near the blade surfaces of an annular compressor cascade under different incidences have been studied based on the oil-film images obtained in an experiment. The structures of the separated flow on the blade surfaces have been given. The results indicate that there are three different separation regions, namely, the top, middle and low separation region, in the annular compressor cascade. The low region is the largest and most important one. The top one is very small. The vortices near the blade tail may concentrate, intensify and even drop off with the increase of the incidence.