ガスタービンの動特性のスティッフ性と非線形性 : 第1報;サージを含む広域シミュレーションへの適用

概要

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This paper describes a digital simulation technique of 1/LP gas turbine with a variable nozzle. A model which has stiffness and nonlinear properties is developed to predict the transient response including a surge behavior. The system's dynamic equations are separated into the stiff linear term and the nonlinear term. The stiffness property is treated by making use of Pade approximation function subsequent to being able to simulate the surge, while the nonlinear term is considered as a disturbance to the system. Numerical results are presented to show the dynamic response of gas turbine by the fuel and/or nozzle angle control that is a step or lump input function. System parameters associated with the generation of the surge cycle are considered if the system satisfies the instability conditions. The influence to the large amplitude oscillatory behavior of surge is presented for inertia of shaft, inertia of duct flow rate in compressor and turbine, volume of combustion chamber and compressor characteristics.
社団法人日本ガスタービン学会の論文
1989-03-10