The Aerodynamics Design And Analyse Of Two Stage Counter-Rotating Compressor

From the latest developing trend of the compressor of high performance all around the world, we can find that developing the design and experimental technology related to counter-rotating compressor and mastering its pivotal technology will closely related to aviation, energy, traffic, chemical and other fields of the national economy. Thoroughly researches to the performance and detailed flow fields structure of counter-rotating compressor are extremely significant to further improving the thrust-weight ratio of aeroengine.The main purpose of this thesis is to study the aerodynamics design of counter-rotating compressor, to explore the problem differing from the aerodynamics design of general compressor, and to provide some reference for development of aeroengine with higher thrust-weight ratio.In this paper, the aerodynamic performance and flow field of a double rows counter-rotating axial compressor were investigated using the streamline curvature method. It is aim that the influence of the rotating speed on some parameters of two counter-rotating rotors, including exiting velocity, flow angle, Mach number, reaction degree, load factor and diffusion factor, to study the pressure ratio on the performance of rotors on the base of the changed rotating speed.It is showed that the design system of counter-rotating compressor, compared with general compressor, have no evidence difficulty, this system of general compressor is a useful system for counter-rotating compressor; counter-rotating compressor without stators, a double rows counter-rotating rotors' rotate speed influenced flow angle, diffusion factor obviously; the large difference between both rotors' rotating speeds can induce the separation or distortion of flow field, but if the total pressure ratio of two rotors will be changed properly in the design stage, the possibility of the distorted flow filed will be reduced. The present investigation on the counter-rotating compressor is valuable for both reference and application of the counter-rotating compressor, and it will provide foundation and interrelated technology repertory for counter-rotating turbo machinery, and provide a use for reference meaning for a newly counter-rotating...