基于eN-数据库方法复杂构型飞机转捩预测

为探索边界层转捩对大型运输机在起降条件和有较大层流区的巡航条件下的气动力精确计算问题，通过在三维RANS求解器中引入eN-数据库方法来预测飞行器表面的转捩位置，并探索转捩对气动力的影响规律。方法与目前流行的基于间歇因子控制方程的转捩预测方法相比，具有计算效率高、易于工程应用、且考虑TS不稳定性转捩因素的特点。在此基础上，通过计算NASA梯形翼来分析起降构型条件下气动力受转捩影响的规律，并通过计算DLR－F6翼身组合体来探索三维构型在巡航条件下的气动力精度。使用eN-数据库转捩判断方法的计算结果与实验值吻合较好，验证了所构建的基于RANS求解器的eN-数据库转捩预测方法的有效性，并为大型运输机气动力精确计算提供了分析工具。

eN-Database Transition Prediction Method and Application to Transport Ari pl ane

Abts rca t:This paper studies eN-database transition prediction method coupled with an unstructured RANS solver in order to investigate transition locations and aerodynamic coefficients of the taking off , landing and cruising conditions of trasport airplanes .Comparing with transition prediction method based intermittency ,eN-database method would be more promising because of its highly efficient ,easy to use for industrial applications and considering TS instability .Aerodynamic coefficients and transition locations of taking off and landing conditions are investigated by computations of NASA trap wing , and aerodynamic coefficients and transition locations of cruising condition are investigated by computation of DLR-F6 wing-body configuration .Good agreement between computational and experimental aerodynamic coefficients and transition locations of transport airplanes verifies the validity of method developed in this paper ,and provides an analysis tool for computation of transport airplanes .