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发表于 2023-11-17 17:11:51
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According to continuity equation, for isentropic flow through a variable area, the rate of change of pressure depending on Mach number and the change of the flow area. When Mach number is less than 1, pressure and density will increase, and velocity will decrease as the area increase. When Mach number is greater than 1, pressure and density will increase, and velocity will decrease as the area decrease.
Based on this, to get the pressure ratio higher than the number of stages on axial compressor, its necessary to get Mach number greater than 1 to so that the change of pressure will increase with decrease area. The current method is forming a shock wave on the stator row, so that the pressure will significantly increase after the shock and finally to get the desired pressure ratio.
The difficulty is how to precisely control the velocity in each stage, and got the most efficient solution. I think this is 2266998 said the numerical mold of twin-spool and triple-spool turbines.
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