Experimental and Calculation Studies of a Series of Centrifugal Compressors of a Turboexpander Unit

The development of high-performance centrifugal compressors, working as part of turboexpander units, is an urgent task. Fractional composition of hydrocarbon gases, mass flow rate, as well as initial pressures and temperatures vary significantly for different objects and seasons. For this reason, an individual design of the centrifugal compressors for specific design parameters is necessary. Using the universal modeling method, it is possible to design new centrifugal compressors based on model stages in a short time. The new versions of the mathematical model are improved and verified using experimental data from the tests on the turboexpander centrifugal compressors, designed according to the 4th version of the method, which does not take into account the roughness of the elements in the flow part. The values of efficiency and loading factors measured on the manufacturer’s experimental stand differ significantly for different versions of the centrifugal compressors. A calculation of the characteristics of the 8th version of the mathematical model of the universal modeling method showed good congruence of the efficiency and loading factors with the average experimental values.

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