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Comparisons of TVD schemes for turbulent transonic projectile aerodynamics computations with a two‐equation model of turbulence
Author(s) -
Lin Herng,
Chieng ChingChang
Publication year - 1993
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.1650160503
Subject(s) - transonic , turbulence , projectile , shock (circulatory) , aerodynamics , total variation diminishing , computation , flow (mathematics) , mechanics , physics , range of a projectile , mathematics , algorithm , medicine , quantum mechanics
The development of a computer program to solve the axisymmetric full Navier‐‐Stokes equations with k ‐ε two‐equation model of turbulence using various total variation diminishing (TVD) schemes is the primary interest of this study. The computations are performed for the turbulent, transonic, viscous flow over a projectile with/without supporting sting at zero angle of attack. The predicted results, as well as the convergence characteristics, by various TVD schemes are compared with each other. The results show that the TVD schemes of higher‐order accuracy do have influence on the regions of high gradients such as shock, base corner and base flow. However, the schemes of third‐order accuracy do not necessarily improve the agreement with measured data (which is not available on the base) than that of second‐order accuracy, but surely generate apparent different result of base flow. The supporting sting on the projectile base will complicate the base flow and the existence of the sting will slightly shift the shock location and slightly change the flow field after the shock. More iteration steps are needed to get the converged results in the computation for the projectile with sting.