Simulating head characteristics of the centrifugal compressor impeller

A set of computer programs for the centrifugal compressor gas-dynamic design based on the mathematical models of efficiency and pressure is widespread in the design practice. It is a universal simulation method elaborated at the Peter the Great St. Petersburg Polytechnic University. A simple mathematical model of the head characteristic is developed for introduction at the primary design stage. Based on analyzing results of more than 120 tests of several model stages and their varieties, it is customary to simulate the head coefficient characteristic, i.e. the flow coefficient in the form of a linear dependence. This characteristic passes through the “computed head coefficient — computed flow coefficient” point and the point of head coefficient at the zero flow. The relative vortex intensity in the well-known Stodola’s formula is taken as the basis for computing the latter point. Dependence approximating the experimental data ensures sufficient accuracy in the head characteristic computation, which could ensure meeting the technical specification requirements for a gas-dynamic project.
EDN: KSLBWF, https://elibrary/KSLBWF

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