Method, system and terminal for optimizing gas compressor casing treatment to improve stability margin
A casing processing and stability margin technology, which is applied in the field of compressors, can solve the problems of severe fluctuations in the outlet pressure of the compressor, inability to adapt to the increase in the intake air volume of the compressor, and increased surge margin.
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[0104] 1. Prototype casing processing numerical calculation
[0105] (1) Prototype casing processing geometry model
[0106] The prototype case processing model is a structure with an axial chute and a return chamber.
[0107] (2) Establish a plane numerical model
[0108] Prototype case handling structure with axial chute and return chamber.
[0109] 2. Numerical calculation
[0110] 2.1 Computational domain
[0111] The CFD method is used to simulate the turbine flow field. In order to reduce the amount of calculation, the periodic boundary processing method is adopted. The calculation domain only includes one flow channel. In addition, in order to ensure the calculation convergence, the outlet position is moved downstream along the Z axis (flow direction of the working medium). Extend 1 times the chord length of the rotor blade.
[0112] 2.2 Grid division
[0113]The calculation grid adopts visual IGG / AutoGrid5 to divide the single-channel grid, and the entire calcula...
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