Method for optimizing turbofan engine performance simulation platform under the condition of rain absorption

Abstract

The invention relates to a method for optimizing a turbofan engine performance simulation platform under the condition of rain absorption, comprising the following steps: selecting the test condition of a high-bypass-ratio turbofan engine, determining the mass flow ratio of rainwater in an air inlet channel of the engine relative to air according to the test condition, and further determining the mass flow ratio of rainwater entering the core engine relative to air; calculating the thermodynamic gas performance parameter corrected value, the mechanical loss influence corrected value and the component aerodynamic performance corrected value; and correcting the parameters of the turbofan engine performance simulation platform according to calculation results. By adopting the method, the turbofan engine performance simulation platform under the condition of rain absorption can accurately and reliably reflect the change of engine performance status in a rainwater environment, so that the rain absorption performance of a turbofan engine can be evaluated simply and quickly in the initial design stage of the engine, the design scheme can be corrected and improved in time, repeated iteration in the later stage is avoided, the cost of development is reduced, and the development cycle is shortened.

Description

technical field [0001] The invention relates to the field of aero-engine design, in particular to an optimization method for a performance simulation platform of a turbofan engine under a rain-absorbing working condition. Background technique [0002] Due to changes in meteorological conditions during the flight, the engine inlet may absorb a large amount of rainwater. This will alter the operation of the compressor, combustor, turbine, and nozzle, and can cause engine stalling, surge, mechanical damage, and even severe loss of thrust. There have been many serious air accidents caused by aircraft absorbing rain in the history of aviation flight. Therefore, both the US Federal Aviation Administration (FAA) and the European Aviation Safety Agency (EASA) have promulgated airworthiness regulations on rain absorption, which put forward safety requirements for engine performance and structural strength integrity in extreme rainfall environments. [0003] The existing general eng...

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Problems solved by technology

[0003] The existing general engine performance simulation platform mainly provides the engine performance simulation function based on the normal environment. Such a general engine performance simulation platform does not take into account the influence of the rain environment on the platform during the initial design stage of the engine, making it difficult to Accurate and highly reliable evaluation and analysis of the actual rain absorption performance of the engine, the evaluation results are also difficult to support the requirements of airworthiness certification

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