Structure Design And Strength Analysis Of The Turbine Based On Fast-Startup Of The Turbojet Engine

Fast-startup performance is an important part of researching on the turbojet engine which be used for missile. A new method of fast-startup is researched in this thesis. Adding startup teeth on the back of the turbine, and using the impact of the burning gas in order to startup quickly. The fast-startup turbine is lucubrated in this thesis.First, some projects of fast-startup is discussed. A project of the new method is bring forward and designed. The principle and math model of the method is introduced.Second, the detailed structure of the fast-startup turbine is designed. 3D model of the turbine is made by the UG software, and this is prepare for the finite element analysis.Third, the force of the whole turbine is analyzed detailedly. Some stress concentration points are researched emphatically, for example the root of the turbine vane, fixed hole, the root of the startup teeth. The result proved that the fast-startup turbine is more advanced than the original one.Finally, the vibration characteristic in different condition of the fast-startup turbine be analyzed. A method which is achieved easily in order to eliminate the sympathetic vibration is put forward.