Computer-Aided Design and Construction Development of the Main Elements of Aviation Engines

Abstract

In the article it is described developed database of aviation materials and expert system of decision-making of computer-aided design of aviation engines and ground power plants on their basis. The database of aviation materials contains information on the properties and characteristics of a large number of materials used in the design of aircraft engines. The system allows automated selection of materials for parts and assembly units. In this case, the thermogasdynamic calculation of the engine as a whole, a detailed aerodynamic calculation of the assembly units and its strength calculation are performed. In the article it is shown description of mathematical model scheme of expert system. There are simulation results of low-pressure compressor (with different laws of profiling flow passage and different number of stages) for turbojet bypass engine with afterburner of the fourth generation of military high-maneuverable aircraft; there are shown also simulation results of high-pressure compressor for turbofan engine with a high bypass ratio for a civil aircraft, and also results of modelling of rotor blade of fan. Results of simulation were compared with construction of series-produced engines. Using the developed system, it is possible to optimize the weight dimension characteristics of the main components of aircraft engines in the early stages of design.