02.1 - Aerodynamics - CFD Methods and Validation
NUMERICAL STUDY OF FIXED TRANSITION LOCATION EFFECT ON SUPERCRITICAL WING AERODYNAMIC CHARACTERISTICS
G.P. Qian¹, J.T. Si¹, X.H. Qin¹, Y. Zhong¹; ¹Shanghai Aircraft Design and Research Institute, China
Numerical simulations are performed to investigate the effect of fixed transition location on supercritical wing aerodynamic characteristics for transonic supercritical flows. The three-dimensional compressible full potential equations coupled with boundary-layer corrections are solved. Computational grids around wing/body/nacelles are built by algebraic methods. Solutions at both wind tunnel Reynolds number and flight Reynolds number are numerical computed, and are compared with high Reynolds number experimental data. The simulation results and high Reynolds number experimental data are quite similar, indicating the mesh quality and numerical methods are adequate in this study. The key point of this paper is the fixed transition location effect on pressure distribution, boundary layer thickness and lift-to-drag characteristics. Many numerical simulations are conducted over a range of parameters (Reynolds number, Mach number, etc). The numerical results indicate that the fixed transition location plays a significant role on aerodynamic characteristics of supercritical wing in wind tunnel test .The current numerical studies can give some useful guidance for low Reynolds number wind tunnel test to provide rnreliable and validated wind tunnel test data for the correction of Reynolds number effect.