A new method for flow field calculation in engineering combining RANS(Reynolds averaged Navier-Stokes) with DES(detached eddy simulation) was proposed

and was applied to the flow field calculation of six kinds of vehicles

such as the first generation of manned spacecraft Mercury

the second generation of manned spacecraft Gemini

the first probe of human that reached over Mars

cruise missiles that posses large quantity of experimental data(with the incoming Mach number from 0.50 to 2.86)

Waveriders with large volume efficiency

CAV(common aero vehicle) with high lift-drag ratio

etc.During the flow field calculation

the divided-zone technology was adopted

which means employing the RANS method during the calculation of the whole flow field

but employing the DES analysis method only in the zone characterized by large-scale separation or severe separation.The numerical simulation of 63 cases of the six kinds of typical vehicles finished in this paper suggests:although employing the DES method only in the severely separated zone is not DES exactly

the numerical results (including results of aerodynamic force and aero thermal) of the flow field obtained in this way agree with the experimental data well and the efficiency of the flow field is higher than that obtained in the way applying DES in the whole flow field.