Simulation and testing of fluid behavior in the compressor for redesign in the operational area of Nar

According to the need to redesign the 4-stage compressor, dynamic analysis of the fluid in the compressor rotor is needed. Since it is very difficult to access such compressors in practice, by preparing a complete model of the compressor rotor by drawing and mapping and a three-dimensional model, simulating the behavior of the fluid on the rotor including the pressure profile between the blades and the flow rate. volume and output are obtained. The results of the simulation have been compared with the experimental results of the current compressor performance including different types of compressor performance data. Then, by simulating the redesigned compressor, its performance is investigated. According to the obtained results, the maximum Mach number occurs at the inlet of the blades and in the diffusers also at the inlet of the diffusers, therefore, to control the Mach number, it is sufficient to control the Mach number only at the inlet of the blade and the inlet of the diffuser. It is also possible to consider the last stage Impeller about 10% shorter. The obtained results are used to obtain the strength and service life of the redesigned rotor.