摘要: Computational fluid dynamics study is performed to examine the effectiveness of two tripping methods including Hama strip and two-dimensional wire on laminar-to-turbulence boundary layer transition over 6:1 prolate spheroid. The c... 展开 Computational fluid dynamics study is performed to examine the effectiveness of two tripping methods including Hama strip and two-dimensional wire on laminar-to-turbulence boundary layer transition over 6:1 prolate spheroid. The correlation-based transition γ-Re_(θt) SST model that was previously implemented in an in-house CFD software and benchmarked against data for smooth surfaces is employed in the current study. Effect of trip thickness on the performance of both tripping techniques are investigated for a straight and level model at a range of flow speeds. Results indicate that a smaller thickness for Hama strip compared to wire is required to be effective at the same flow condition. Effect of tripping on boundary layer thickness and drag components are also examined. Numerical results are also validated against experimental data for smooth and wire tripped cases on Joubert model and reasonable agreement is achieved. 收起