The computation of supersonic base flows is an interesting topic, especially in the field of advanced propulsion and rocket base drag analysis. In the present paper a representative test case of this class of flows is computed through the RANS approach using a numerical methodology based on the lambda-scheme and on a shock-fitting technique, and the one-equation turbulence model of Spalart and Allmaras. A convergence analysis, which shows the dependence on the shape of computational mesh and on the number of cells, is presented. Grid independent results are compared with other numerical results published in the literature and with experimental data in order to quantify the reliability of numerical prediction and to suggest a correction of the turbulence model for this kind of flows.
Computation of Turbulent Supersonic Base Flows by a Shock-Fitting Quasi-Linear Solver / Nasuti, Francesco; Paciorri, Renato; Onofri, Marcello. - 248:(1999). (Intervento presentato al convegno 3rd ASME/JSME Joint Fluids Engineering Conference tenutosi a San Francisco, California, USA, nel 18-23 Luglio 1999).
Computation of Turbulent Supersonic Base Flows by a Shock-Fitting Quasi-Linear Solver
NASUTI, Francesco;PACIORRI, Renato;ONOFRI, Marcello
1999
Abstract
The computation of supersonic base flows is an interesting topic, especially in the field of advanced propulsion and rocket base drag analysis. In the present paper a representative test case of this class of flows is computed through the RANS approach using a numerical methodology based on the lambda-scheme and on a shock-fitting technique, and the one-equation turbulence model of Spalart and Allmaras. A convergence analysis, which shows the dependence on the shape of computational mesh and on the number of cells, is presented. Grid independent results are compared with other numerical results published in the literature and with experimental data in order to quantify the reliability of numerical prediction and to suggest a correction of the turbulence model for this kind of flows.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.