An accurate RANS-based transition prediction approach (part II)

Abstract

Abstract We present a CFD analysis of a wind tunnel model of the new laminar turbo-prop aircraft designed in the frame of the European Clean Sky 2 programme. The work presents the numerical results of the aerodynamic performance of a scaled model of the innovative laminar turboprop A/C wing by using a CFD approach that includes the transition prediction. Numerical results will be compared by considering two different procedures: a) CFD analyses in which the transition location is imposed and b) CFD analyses in which the position of the transition is evaluated. The prediction of the transition location and the laminar flow extension is based on a numerical framework based on the coupling between a high-fidelity RANS tool and a Linear Stability (LNS) solver. According to this method, boundary layer equations are written in the conical formulation and the solution of RANS equations and transition onset is obtained through an eN method based on the LNS calculations.