![]() The aspect-ratio of modern aircraft are larger,the flight attitude is higher,which decreases the Is conducive to the realization of laminar flow. Of the structure and manufacture technology,the surface of aircraft becomes smoother,which With the increasing use of composite material and progress Through effective shape designing,Īn extensive laminar flow area can be maintained on the surface of the airfoil,thereby reducing Natural laminarįlow airfoil is a direct and easy drag reduction technique. Laminar flow technology is the most promising avenue to reduce aircraft drag. The reduction in drag can significantly improveĪircraft efficiency (less fuel consumption),thereby increasing the range and payload of aircraft. Of awareness of environmental protection. This goal is particularly critical with further tension of global energy and gradual strengthening It has been an important issue for aircraft design to reduce aerodynamic drag for a long time. Supercritical airfoil to improve the aerodynamic characteristic of airfoils. The results show that natural laminar flow can be achieved on a The optimized airfoil is analyzed and compared with The optimization system is set up based on theĪbove technologies, and the robust design about the uncertainty of the Mach number isĬarried out for NASA0412 airfoil. ![]() The efficiency of the optimization system. Rithm, and the surrogate model based on the Kriging models is introduced to improve The non-dominated sorting genetic algorithm-II (NSGA-II) is used as the search algo. Rational B-spline (NURBS) basis function is introduced to the airfoil parameterization. The non-uniform free-form deformation (NFFD) method based on the non-uniform K-w turbulence model to predict the transition region for a laminar-turbulent boundary The γ-θ transition model is combined with the shear stress transport (SST) ABSTRACT:A transonic, high Reynolds number natural laminar flow airfoil is designedĪnd studied.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |