后掠机翼人工转捩最佳粗糙带高度数值预测

发布时间：2018-03-11 10:11

本文选题：人工转捩　切入点：粗糙带高度　出处：《航空学报》2016年02期 　论文类型：期刊论文

【摘要】：介绍了基于当地变量的γ-Reθ转捩模型,并将该模型应用到后掠机翼的转捩预测和人工转捩最佳粗糙带高度以及人工转捩技术能够模拟的大气飞行雷诺数的确定中。为检验γ-Reθ转捩模型对后掠机翼转捩的预测能力,对ONERA M6机翼和DLR-F4标模机翼进行了边界层转捩预测,采用结构化网格和有限体积法求解雷诺平均Navier-Stokes(RANS)方程,得到了机翼表面的摩擦阻力系数分布,从而可以得到相应的转捩位置,预测得到的转捩位置与试验结果比较吻合,说明该模型对后掠机翼转捩预测是可信的。最后在DLR-F4标模机翼上表面固定了粗糙带,通过相同的方法得到了转捩位置,从而确定了马赫数为0.785、雷诺数为3.0×106时最佳粗糙带高度为0.11mm;通过不断增大雷诺数使自由转捩位置不断向前缘移动,验证了人工转捩对大气飞行雷诺数的模拟能力。结果表明,在最佳粗糙带高度为0.11mm下,可以实现对大气飞行高雷诺数的模拟。
[Abstract]:The 纬 -Re 胃 transition model based on local variables is introduced. The model is applied to the prediction of the transition of the swept wing, the determination of the optimum height of the rough zone of the artificial transition and the determination of the Reynolds number of the atmospheric flight which can be simulated by the artificial transition technique. In order to test the prediction ability of the 纬 -Re 胃 transition model for the transition of the swept wing, the model is applied to the prediction of the transition of the swept wing. The boundary layer transition of ONERA M6 wing and DLR-F4 model wing is predicted. The Reynolds average Navier-Stokes Stokes RANSs equation is solved by using structured grid and finite volume method. The friction coefficient distribution on the surface of the wing is obtained, and the corresponding transition position can be obtained. The predicted transition position is in good agreement with the experimental results, which shows that the model is reliable for predicting the transition of the swept wing. Finally, rough bands are fixed on the upper surface of the DLR-F4 model wing, and the transition position is obtained by the same method. The optimum height of rough zone is 0.11mm when the Mach number is 0.785and Reynolds number is 3.0 脳 106, and the free transition position is continuously moved forward by increasing Reynolds number, which verifies the simulation ability of artificial transition to atmospheric flight Reynolds number. At the optimum height of 0.11mm, the high Reynolds number of atmospheric flight can be simulated.
【作者单位】：西北工业大学翼型叶栅空气动力学国家重点实验室;纽约城市大学城市学院土木工程系;
【基金】：国家自然科学基金(JC-201103) 航空科学基金(2013ZD53057)~~
【分类号】：V211.41

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