TS-21 Prediction of the Transient Behavior of a Regenerative Gas Turbine(Session A-6: Performance 3)

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This paper describes models for the dynamic simulation of a regenerative gas turbine and presents the predicted transient behavior of a 100kW class engine equipped with a stationary type recuperator. Integral forms of the unsteady one-dimensional conservative equations are introduced in deriving basic governing equations. The mathematical model of each component is described with the aid of the unsteady governing equations and steady state component characteristics. Derived equation sets are solved numerically by the fully implicit method. Control logic for speed control is also introduced to simulate real engine operations. For a couple of load change modes such as stepwise and periodic load variations, engine dynamic characteristics are examined. To investigate effects of the thermal inertia of the heat exchanger wall on the transient behavior, the predicted results are compared with those of the case when the metal thermal inertia is neglected. Transient responses of the controlled gas turbine to stepwise load variations are analyzed. In addition, the transient behavior for the high and low frequency load change is simulated to investigate the effects of individual inertia.
公益社団法人日本ガスタービン学会の論文
1999-11-14