Optimization method of turbofan engine performance simulation platform under rain absorption conditions

Abstract

The invention relates to a method for optimizing a performance simulation platform of a turbofan engine under rain-absorbing working conditions, comprising: selecting a test working condition of a turbofan engine with a large bypass ratio, and determining the amount of rainwater in the engine inlet relative to the air according to the test working condition The mass flow ratio of the mass flow ratio, and further determine the mass flow ratio of the rainwater entering the core machine relative to the air; respectively calculate the correction value of the thermodynamic gas performance parameter, the correction value of the mechanical loss effect and the correction value of the aerodynamic performance of the component; according to the calculation results, the turbofan The parameters of the engine performance simulation platform are corrected. The invention enables the performance simulation platform of the turbofan engine under the rain-absorbing condition to accurately and highly reliably reflect the change of the engine performance state in the rainwater environment, so that the turbofan engine can be easily and quickly tested in the preliminary design stage of the turbofan engine. The rain absorption performance is evaluated in order to correct and improve the design plan in time, avoid repeated iterations in the later stage, reduce the development cost and shorten the development cycle.

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...

AI Technical Summary

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

Images