Contributions to HiLiftPW-3 Using Structured, Overset Grid Methods

Coder, James G ; Pulliam, Thomas H ; Jensen, James C

关键词: AERODYNAMIC CONFIGURATIONS;    COMPUTATIONAL GRIDS;    COMPUTER AIDED DESIGN;    FINITE DIFFERENCE THEORY;    STRUCTURED GRIDS (MATHEMATICS);    TURBULENCE MODELS;    WING NACELLE CONFIGURATIONS;    TRIANGULATION;    TIME DEPENDENCE;    PREDICTIONS;    FLAPS (CONTROL SURFACES);    PYLONS;   

RP-ID  :  ARC-E-DAA-TN52245

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

The High-Lift Common Research Model (HL-CRM) and the JAXA Standard Model (JSM) were analyzed computationally using both the OVERFLOW and LAVA codes for the third AIAA High-Lift Prediction Workshop. Geometry descriptions and the test cases simulated are described. With the HL-CRM, the effects of surface smoothness during grid projection and the effect of partially sealing a flap gap were studied. Grid refinement studies were performed at two angles of attack using both codes. For the JSM, simulations were performed with and without the nacelle/pylon. Without the nacelle/pylon, evidence of multiple solutions was observed when a quadratic constitutive relation is used in the turbulence modeling; however, using time-accurate simulation seemed to alleviate this issue. With the nacelle/pylon, no evidence of multiple solutions was observed. Laminar-turbulent transition modeling was applied to both JSM configuration, and had an overall favorable impact on the lift predictions.