Performance Simulation Of Marine Biaxial Gas Turbine

Owing to large specific power and big single-machine capacity, today gas turbine has already become one of the main propulsion motility for large and middling warship. In order to provide one technical analysis platform of fitting power plant with warship for manage department making exactness decision, it is quite necessary to develop general-purpose shipboard machinery system simulation platform. Based on the above, this article select gas turbine simulation model, which is one of general-purpose simulation platform to taking the study.Carry out simulating and researching on gas turbine using computer, the key is to construct one simulation model, which can precisely describe characteristic of gas turbine. Because gas turbine is one intricate nonlinear thermodynamic system, the usual simulation modeling use shortcut calculation method,which would affect accuracy of the simulation. In order to improve simulation accuracy, this article establish one improved nonlinear two shaft turbine dynamic simulation model which is taking into account of capacity inertial based on 7LM2500PB101 marine gas turbine steady-state behavior data of GE company and under MATLAB / SIMULINK software environment. The advanced model is adopted variable specific heat method for calculation,and also is taken into account of the influence of oil gas ratio and power turbine exhaust pressure's variance.Found each partial's natural parameter through stable-state heat calculation , and verify it in whole thermodynamic process computational procedure, then sort out each partial's performance curve. Then adopt SIMULINK software to establish correctional simulation model and finish dynamic simulation under different kinds of simulated varying duty condition.The simulation result shows that: the improved simulation model's operation result is more tallies with test data. It has higher accuracy than the preventing simulation model, and it is able to reflect system dynamic state more accurately.