Three-dimensional compressible jet-in-crossflow calculations using improved viscosity models and adapted gridPrevious calculations of jet-in-crossflow problems have been sensitive to the turbulence and artificial viscosity models and to the grid. Consequently, the eddy viscosity model in the PARC3D code was modified to consider the turbulent jet by switching from the Baldwin-Lomax (1978) model to an axisymmetric jet model. A modified artificial viscosity model has been utilized and evaluated in this study as well. The new model includes cell size scaling and a directional dependence in the coefficients. Computational results from PARC3D demonstrate the effects of the viscosity models on the pressure distribution fore and aft of the jet and the ability of the adaptive grid scheme to adjust to the three-dimensional gradients around the jet.
Document ID
19900060151
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lytle, John K. (NASA Lewis Research Center Cleveland, OH, United States)
Harloff, Gary J. (NASA Lewis Research Center Cleveland, OH, United States)
Hsu, Andrew T. (NASA Lewis Research Center; Sverdrup Technology, Inc. Brook Park, OH, United States)