CONCEPT OF MATHEMATICAL MODELS FOR A TURBO-COMPRESSOR UNIT OPERATED AT A VARIABLE ROTARY SPEED

Zbigniew Jędrzejowski, Andrzej Miller

Abstract


The concept has been described in this work, of a mathematical model for a centrifugal compressor with the driving steam turbine unit operated at a variable rotary speed.

The turbo-compressor model as presented herein, comprises several versions of models of turbines and compressors to describe the turbo-compressor unit performance in varying operating conditions not much remote from nominal rated. The models do not apply to transient conditions.

Use has been made as regards the development of the models both of the general properties of imeller machine and of the approximations of reduced performance charactersitics of machines involved.


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