The target thrust reverser doors are essentially two-dimensional

and the Mach number of reversed jet is between 0.30 and 0.50.By using the simplifying assumptions of inviscid

incompressible and two-dimensional flows

the flow within target thrust reverser was analyzed.In the analysis

a pair of transformations was used to calculate the ejection angle.According to the transformations

the ejection angle can be expressed as a function of reverser geometric parameters

such as door length

endplate height

door sweep angles and endplate angle.For calculating the actual reverser thrust

the model for calculating ejection angle was combined with the turbofan engine performance model.At last

with this model

the reverser thrust of a turbofan engine was calculated and compared with the test results

showing excellent agreement between them.