低反动度压气机常规级设计及数值模拟动力机械及工程专业论文.docx

哈尔滨工业大学工学硕士学位论文 哈尔滨工业大学工学硕士学位论文 - - PAGE IV - The author carries out 3D numerical simulation by using the commercial software NUMECA. The flow structure and load performance of the rotor and the performance of the off-design conditions are researched. The simulation result shows that the designed rotor has high isentropic efficiency and good flow field structure. The result of off-design conditions indicates that the rotor has wide steady working range, which can satisfy the design requirements. At the end of the thesis, the author study the numerical simulation result under different geometric parameters, analyze the difference on the aerodynamic performance and the flow field structure under different geometric parameters, such as cascade solidity, radial clearance, et al. then a selective rule of the parameters is generalized. The result indicates that there is a good selective range in the cascade solidity. In the range the flow field structure perform better and the loss less. The result also indicates that when radial clearance exists in stator blade, the flow filed structure is improved clearly, and the spiral point in the angular region is fade, at the same time the back flow in the angular region is weakened. However, should note that the smaller of the radial clearance, the less of the loss. Keywords Low-reaction; compressor design; 3D numerical simulation 目 录 摘 要I Abstract II HYPERLINK \l _bookmark0 第 1 章 绪论 1 HYPERLINK \l _bookmark0 1.1 引言 1 HYPERLINK \l _bookmark0 1.2 轴流压气机简述 1 HYPERLINK \l _bookmark0 1.2.1 轴流压气机的发展历史 1 HYPERLINK \l _bookmark1 1.2.2 国内外研究现状 3 HYPERLINK \l _bookmark2 1.2.3 低反动度压气机设计概念 6 HYPERLINK \l _bookmark3 1.3 压气机气动设计体系的发展 8 HYPERLINK \l _bookmark3 1.3.1 一维、二维气动设计体系 8 HYPERLINK \l _bookmark3 1.3.2 准三维设计体系 8 HYPERLINK \l _bookmark4 1.3.3 全三维设计体系 10 HYPERLINK \l _bookmark5 1.4 CFD在叶轮机械中的应用 12 HYPERLINK \l _bookmark5 1.4.1 网格生成 12 HYPERLINK \l _bookmark5 1.4.2 空间离散格式 12 HYPERLINK \l _bookmark6 1.5 本论文研究的主要内容