Based on the flight test of the turbo-fan engine

the system of mass flow measurement of the engine was designed and built

and mass flow of the turbo-fan engine was measured in the flight test under some different flight conditions and engine conditions.The test data was selected

calculated and analyzed

and then

the effect of every factor on mass flow of the engine was evaluted.The technique feasibility and result accuracy was validated and some usable conclusions of the mass flow measurement and analysis for the engine mass flow measurement designed were obtained.All of these provided foundation for the mass flow measurement and analysis of the subsequent models.Numerical simulation model for the engine mass flow was established and modified using flight test data.By comparing some results of numerical simulation with flight test data

it is found that the numerical results are in agreement with flight test data and the error is acceptable.