Service life examining accelerating test run method for long-service-life aircraft engine

Abstract

The invention discloses a service life examining accelerating test run method for a long-service-life aircraft engine. The method mainly comprises: collecting data on using conditions of the engine; calculating working conditions of the engine within a certain time; determining time required by the engine for work each time and distributed time in different working states according to service life requirements, starting times, shut-down times and average single flight time of the engine; carrying out data fusion to form a typical using state curve of the engine according to conventional using operating instructions of the engine; adopting a rainflow counting method to extract major and minor using stats of engine load; adopting a durable-service-life damage equivalence principle to convert minor state time of the engine load into major state time of high load or delete the minor state time of the engine load, and forming an engine high load state using curve; and working out test run procedures to determine actual testing time of the engine. The service life examining accelerating test run method for the engine greatly shortens time and reduces expenses for service life examining test run of the long-service-life aircraft engine.

Description

technical field [0001] The invention belongs to the technical field of aero-engine testing, and in particular relates to an accelerated test run method for life assessment of long-life aero-engines, especially a life test test technology based on typical working conditions and equivalent methods of life consumption. Background technique [0002] The service life of early aero-engines was short, and the life management method of repairing the engine within a given period of time was mainly adopted. Therefore, the traditional life assessment method is to conduct a test run assessment according to the actual life of the engine. This test method is simple, and it is easy to implement when the given engine life is not long. For example, a certain type of aero engine has a service life of 200 hours and consumes 1 ton of fuel per hour. The engine life assessment can be completed within one month. , the assessment fund is about 2 million, which is acceptable in terms of time and eco...

AI Technical Summary

Problems solved by technology

The traditional engine life test assessment does not distinguish the impact of different engine usage conditions on the engine life, and the test run assessment is carried out according to the actual life of the engine. Therefore, the test run assessment method is very unscientific, which leads to long engine life test run assessment time and high costs.

[0004] With the development of the aviation industry, the life of aero-engines is getting longer and longer. Production practice urgently needs to provide a more scientific test method that can accelerate the life assessment of aero-engines, so as to solve the long test period of the test run according to the actual life of the engine. Problems such as high cost consumption

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