Авіаційно-космічна техніка та технологія (Aug 2022)
Performance analysis of turbofan engine with afterburner with water injection at high-pressure compressor inlet
Abstract
Aircraft capabilities determine the performance of the engine that powers it, and therefore, the creation of the latest high-speed aircraft is directly related to the development level of aircraft engine building. The main requirements for high-speed aircraft engines are an extended operating envelope in terms of speed and flight altitude. Specific thrust and specific impulse increase with each new generation of turbofan engines with afterburner, but the use of high technology leads to a significant increase in engine cost. Simultaneously, the design of existing engines has large reserves for modernization. The water injection system in the turbofan engine with afterburner is one of the available ways to improve the design. Such updated engines will theoretically meet the requirements of high-speed air-craft developers regarding thrust and other key parameters. Simultaneously, communication with the existing types of power plants will remain. This article considers the possibility of expanding the operating envelope and short-term forcing of the turbofan engine with afterburner of classical configuration to flight speeds equal to Mach number 3. This paper studied the effect of water injection at the high-pressure compressor inlet of the turbofan engine with afterburner on its performances. The authors present the results of calculations regarding the effect of water injection at the high-pressure compressor inlet of turbofan engine with afterburner on the parameters of working fluid along the engine duct. The application of the obtained results will improve the thermodynamic efficiency and expand the operating envelope of turbofans engines with afterburner using materials widely applicable in the production of aircraft gas turbine engines in our time, as well as reduce the period of creating competitive engines for high-speed aircraft due to targeted search their rational thermodynamic and constructive-geometric outline.
Keywords
