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介绍了基于当地关联的γ-Reθ转捩模型,通过Spalart建议的环境源项法对自由流湍流度衰减的有效控制,实现了该转捩模型的实用化。利用中国空气动力研究与发展中心的TRIP软件平台上实现的该转捩模型,对S809翼型、NLR7301两段翼型和30P30N三段翼型3个低速翼型绕流问题进行了计算,将不同迎角下的计算结果与试验结果进行比较分析。计算结果表明:该模型可以比较准确地模拟各种外形的分离转捩与自然转捩的位置及湍流在顺压梯度区的再层流化现象,有效提高了气动力模拟的精度,具有工程应用价值;验证了TRIP软件平台上γ-Reθ转捩模型在二维问题上模拟的正确性;在中等雷诺数范围,层流区域和湍流区域有相同量级时,计算必须采用转捩模型才能准确模拟气动力。
The γ-Reθ transition model based on the local correlation is introduced, and the turbulence decay of free-flow turbulence is effectively controlled by the Spatial Source Term Method proposed by Spalart, which realizes the practical application of the transition model. Using the transition model realized by TRIP software platform of China Aerodynamics Research and Development Center, the calculation of flow around three low-profile aerofoils of S809, NLR7301 and 30P30N is carried out. The calculation results under the angle of attack are compared with the test results. The calculation results show that the model can simulate the position of separation transition and natural transition and the re-fluidization phenomenon of turbulent flow in the gradient gradient region, which can effectively improve the accuracy of aerodynamic simulation. It has the advantages of engineering application The correctness of the simulation on the two-dimensional problem of the γ-Reθ transition model on the TRIP software platform is verified. In the medium Reynolds number range, when the laminar flow region and the turbulent flow region have the same magnitudes, the transition model must be used to calculate accurately Pneumatic simulation.