To investigate the influence of engine powered effect on aerodynamics characteristics of civil aircraft at takeoff condition

the method was employed to solve the 3-D compressible Reynolds-averaged N-S(Navier-Stokes) equations on a multi-block structured grid. Firstly

the turbine powered simulator model and a high-lift standard model were computed to validate the reliability of method; the excellent agreements between computational and experimental data demonstrated that the method was feasible to predict the engine power effect and flow field around a civil aircraft high lift configuration. Secondly

the engine power effect on aerodynamic characteristics of a typical civil aircraft were researched with flow-through and powered nacelles. Results show that aerodynamic characteristics based on powered nacelles differ obviously from flow-through ones. It's recommended that the engine power effect should be considered with powered nacelle in numerical simulation to gain more credible aerodynamic characteristics.