Aerodynamic Analysis And Optimization Design Of Regional Jet’s High-lift Device

High-lift devices are indispensable affiliate components of the wing for a modern plane，and alsohigh-device is a key technique for increasing the take-off weight、rolling a shorter distance、improvingsafety and the airplane adaptability. The high-lift device displays an extremely complex flow field whichinspired the computational fluid dynamics focusing on the flow simulation around. High-lift device designis a difficulty in aerodynamics leaves CFD a big room to participate the high-lift device design. Theaerodynamic design of high-lift device is based on the simulation and analysis on multi-element airfoilflow field.This paper introduces the technical features of the slat and flap and a design project is developed forthe layout of the high-lift device and the multi-element airfoil based on a regional jet. Three and foursections airfoil configurations are designed, in order to explore the optimized2-D configuration of thehigh-lift system, advanced CFD techniques and an optimization approach which combines the geneticalgorithm and the sequential quadratic programming are employed to analyze the different gap and theangle of the slat and flap, followed with a optimization configuration. The geometric of the wing-body withhigh-lift device is established based on the optimized multi-element airfoil and the configuration of thenew regional aircraft. Through aerodynamic analysis, the change from2-D to3-D is obtained.The process of optimizing process depends on the general optimization software-Isight whichintegrated Gambit and Fluent. By using this platform, the design becomes an automatic cycle with a highefficiency and less time-consuming.