Low-Reaction & High-Loaded Axial Aspirated Compressor

Nowadays it is required that an axial compressor should have higher single-stage load and less stage. However it is very difficult to achieve this target using traditional design method. Therefor, the author introduced a new design concept based on'Low-Reaction'for the first time in order to solve this problem. By numerical simulation, the new design concept had proved useful.The author systematically expounded the new design concept. In order to restrain or eliminate the boundary separation of a rotor with large turning angle and keep it working in high efficiency, the rotor's inlet should be prewhirled so that its reaction was reduced. As a result, the stator had an extra-large turning angle. The application of aspiration on compressor stator should be carried out in order to control its intensive 3D separation flow. Based on the Low-Reaction concept, the author developed a quasi-3D aerodynamic design program and a 3D blade generate tool using the Fortran Language. Considering the limit of the stator's turning angle, the author made the capacity for work distribute as an arbitrary parabolic curve along the blade height direction in the quasi-3D aerodynamic design program.The author carried out the 3D numerical simulation of the rotor generated by the program using the commercial CFD software. The simulation result declared that the rotor had high isentropic efficiency and wide working area. The capacity for work along the blade height direction met the demand.The author studied the difference on flow field structure under different geometric conditions such as consistency, aspect ratio, etc. Then using the optimization design method the author optimized the stator. It contained R-S flow angle optimization, thickness distribution optimization and stacking optimization.At the end of the thesis, the author detailedly studied the application of aspiration on compressor stator. Through analyzing the result of numerical simulation on variable aspiration mode and position, the author got the best mode and position. Then the complex aspirations was used to control the 3D separation flow in stator cascade and got a great effective. Meanwhile the topology analysis...