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Abstract

For turbomachine surging arising from interaction between the turbomachine and duct system discharge-pressure characteristics, simple lumped-parameter models for duct inertia, elasticity and losses are used to review existing stability criteria for and descriptions of the phenomenon. Conventional descriptions are shown to relate specifically to lumped-inertia models, whereas different conditions for stable operation are given by lumped-elasticity models. For systems with both inertia and physically discrete elasticity, the stability criteria depend on system configuration and hence such models are not suitable for application to distributed systems. An approach to distributed systems to overcome this limitation is suggested.

Keywords

turbomachine surging simple lumped-parameter models pump and compressor systems stability criteria

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Simple First-Order Models for Surging in Pump and Compressor Systems

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