Numerical Simulation on the Controllable Two Stage Exhaust Ejector of Gas Turbine

摘要

Marine gas turbine exhaust ejector has been widely used to serve as a simply and highly efficient device for cooling equipment. In order to achieve the exhaust ejector controllable, this paper makes an improvement in the exhaust ejector structure by changing the former single-stage ejector into two of which second stage opening could be adjusted. By comparison of the numerical simulation results of the two models, the improved model shows a better performance in exhaust temperature and engine room ejector flow. We obtained the rules between the opening of control configuration and the performance of ejector, proposing the control process, getting corresponding expected results which were compatible with the gas turbine working conditions. It has provided a reference for developing the new exhaust ejector.