Method for determining lubricating oil flow of aero-engine

The invention belongs to the field of aero-engine thermal management or lubricating systems, and particularly relates to an aero-engine lubricating oil flow determining method which comprises the steps that the temperature of a fuel oil inlet is obtained, and a thermal power curve of a fuel oil and lubricating oil radiator is obtained; the heat exchange amount of the fuel oil and the lubricating oil is calculated based on the known lubricating oil inlet temperature, the known lubricating oil outlet temperature and the known fuel oil flow; the lubricating oil flow is calculated through the heat exchange amount; under the condition that a flow meter is not installed, the problem of determining the lubricating oil flow during operation of the whole machine is solved, and important reference is provided for monitoring of a thermal management system and a lubricating oil system; the whole machine refitting workload is small, no special requirement exists, and the influence on the safety and reliability of the syst