The Numerical Simulation And Experimental Study Of The Marine Gas Turbine Exhaust Ejector System

The structure and the aerodynamics performance of marine gas turbine exhaust ejector system is one of the important aspects when the gas turbine is installed on the naval vessels. According to the technical specification request of some ships, this article takes the earlier exhaust ejector system as the basis. In this foundation, the author preliminary design many kinds of exhaust ejector system to improve its performance. At the same time, because the ship sky is limited, it does not pursue the biggest ejector coefficient. In this article, the exhaust ejector system is designed and some numerical simulations are carried in view of these two aspects request. This article discusses the influence to the ejector coefficient through changing the structure of the exhaust ejector system, and produces the coefficient distributed rule. It provides the reliable basis for further designing the high performance exhaust ejector system.We must master its aerodynamics performance before finalizing the design of the exhaust ejector system. It needs more manpower and material resources as well as longer experimental period to realized characteristic of the different ejector system structures absolutely by model experimentation. According the reality, the following works had been done in this thesis:1. The numerical simulation of the basic and designed exhaust ejector systems. Obtained numerical simulation results of the whole flow fields, with the geometrical boundary completely according with the actual one and nothing being simplified.2. The experiments of the three designed projects are carried out by using a special experimental wind tunnel. The numerical simulation results were verified.