The Behavior Simulation Research On The Marine Inter-cooled Cycle Gas Turbine

The R&D of marine gas turbine has been the mainstream of marine power plant in the navy of every country now. In view of the difficulty, we should transform the home-made simple cycle gas turbine into inter-cooled cycle gas turbine in order to develop China's high-power marine gas turbine. This is a reasonable and convenient option, which also has important practical significance.As a result, the inter-cooled cycle gas turbine is researched in the paper so as to support some reference to the program.The intercooler distributed along the circumference of gas turbine is designed in the paper, and the size is optimized using GA Optimization Toolbox in order to minimize the weight of it. Because of cutting the last 2 states of the low pressure compressor, three methods are described to calculate compressor characteristics. Due to the lack of detailed data, the Statistical Method is chosen to estimate the characteristics of new compressor.The non-linear mathematical models of inter cooled cycle gas turbine system and the various components have been established in this article. And their simulation module including the steady-state and dynamic simulation model has been established based on Matlab/simulink simulation platform using modular modeling methodology. The steady-state simulation is carried out in order to get the characteristic parameters of each cross-section, which are compared with the characteristic parameters of simple cycle gas turbine. And then, the influence of different cooling efficiency to the inter-cooled cycle is analyzed exhaustively. The non-steady state simulation is also carried out. The different situations ,such as driving Marine Generator,driving fixed pitch propeller, are researched comprehensive so as to get the operation law(acceleration,deceleration) of the inter cooled cycle gas turbine.At last, the contrast simulation research between the steady-state and non-steady state is implemented in the main areas. The results show that the mobility of inter cooled cycle gas turbine is the same as simple cycle gas turbine, but the output power of the plan has a substantial increase . And the outlet temperature of chamber is a little lower than it of the simple cycle, reducing of about 30K or so; the thermal efficiency has a slight increase. In a word, the marine inter cooled cycle gas turbine can satisfy the need of marine power plant in high-power gas turbine.