A computational study of wingtip vortex flowfieldThe near-field behavior of a wingtip vortex flow is studied computationally using an incompressible flow solver for the Navier-Stokes equations based on the artificial compressibility method. Inaccuracies in current computational studies are addressed, especially, the role of numerical errors and transition/turbulence modeling. A subset problem is devised in order to make the study of vortex preservation more tractable. As part of the numerical checks, the flow is first run laminar while performing a systematic grid refinement study for the subset problem. Further studies on the numerical errors are conducted with the measured Reynolds stresses introduced into the momentum equations as source terms. As a preliminary study of turbulent flows, the one-equation Baldwin-Barth turbulence model is implemented as well as the approximation of the production term. The full-geometry case is computed using 1.1 million grid points. The results are compared with experiment.
Document ID
19930064203
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Dacles-Mariani, Jennifer (NASA Ames Research Center Moffett Field, CA, United States)
Rogers, Stuart (NASA Ames Research Center Moffett Field, CA, United States)
Kwak, Dochan (NASA Ames Research Center Moffett Field, CA, United States)
Zilliac, Greg (NASA Ames Research Center Moffett Field, CA, United States)
Chow, Jim (NASA Ames Research Center Moffett Field; Stanford Univ., CA, United States)