A rapid analysis model of the open rotor engine

which can be used in aircraft conceptual design

was established by the combination of the test data of high speed propfan and approximate model of turboshaft.The performance

mass and size of the open rotor engine were able to be predicted quickly by this model with a small amount of input parameters.The precision of the model was validated by the experimental data from the references.The model developed in the paper can be used in the aircraft conceptual design to evaluate the benefits of using open rotor engines.