Toward a CFD nose-to-tail capability - Hypersonic unsteady Navier-Stokes code validationComputational fluid dynamics (CFD) research for hypersonic flows presents new problems in code validation because of the added complexity of the physical models. This paper surveys code validation procedures applicable to hypersonic flow models that include real gas effects. The current status of hypersonic CFD flow analysis is assessed with the Compressible Navier-Stokes (CNS) code as a case study. The methods of code validation discussed to beyond comparison with experimental data to include comparisons with other codes and formulations, component analyses, and estimation of numerical errors. Current results indicate that predicting hypersonic flows of perfect gases and equilibrium air are well in hand. Pressure, shock location, and integrated quantities are relatively easy to predict accurately, while surface quantities such as heat transfer are more sensitive to the solution procedure. Modeling transition to turbulence needs refinement, though preliminary results are promising.
Document ID
19890055824
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Edwards, Thomas A. (NASA Ames Research Center Moffett Field, CA, United States)
Flores, Jolen (NASA Ames Research Center Moffett Field, CA, United States)