Computational Fluid Dynamics Analysis of the Stall Characteristics of a Wing Design Based on Prandtl's Minimum Induced Drag

Yoo, Seung Y ; Bowers, Albion H

关键词: COMPUTATIONAL FLUID DYNAMICS;    AERODYNAMIC STALLING;    INDUCED DRAG;    MINIMUM DRAG;    WING FLOW METHOD TESTS;    COMPUTERIZED SIMULATION;    MACH NUMBER;    ANGLE OF ATTACK;    PRANDTL NUMBER;    REYNOLDS AVERAGING;    NAVIER-STOKES EQUATION;    AIRCRAFT DESIGN;    WINGS;   

RP-ID  :  AFRC-E-DAA-TN48257

学科分类：航空航天科学

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Stall characteristics of a wing whose design was based on Prandtl’s minimum induced drag analysis is presented. Flow field is resolved using RANS CFD (Computational Fluid Dynamics) solver OVERFLOW-2. Both in freestream and in ground effect are analyzed. In addition, effect of low-Mach preconditioner on the stall characteristic is presented. Results show that simulations that lack preconditioner predicts higher stall angle as well as much more benign behavior near the stall angle. Stall analysis in freestream show that flow begins to separate at the inboard region. The flow at the tip remains attached until approximately 19.0 degrees angle of attack.